Hey! They're not 'crackheads' any more. Get with the times. Now we call them 'people suffering from substance use disorder'. Doesn't that have a nicer, friendlier sound to it?
The purpose of the catalytic converter is not to reduce carbon DIoxide (CO2). In fact if the catalytic converter works, the compounds that it is intended to reduce (mainly carbon MONoxide and hydrocarbons are converted to carbon dioxide, so this gas actually increases in the exhaust.
@@8020Media ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,poor freakin editing by someone............................reread what you write,,,,,to insure it is right.................misspoke,,,,LOL...when i aim correctly ; i never miss a poke..............................
Be careful who replaces the part. My catalytic converter was stolen off an 2005 Tundra happens to have 2 Took it to BIG O TIRE shop in Bakersfield Ca they sublet the work to BOBS Mufflers picked up my truck when it was ready they forgot invoice from BOBS in my truck for $1800.00. Big O Tire charged me $4800.00 File complaint with BAR they investigated the only thing they did wrong was not disclosing the job was being sublet to BOBS. I got stuck with the bill so dont take car to a shop that is not a MUFFLER SHOP. My friend did worst she was screwed by a smog shop $5400.00 to replace them on a JEEP.
I've learned how to do repairs myself, i have done wheel bearings, control arms, brake pads, rotors, water pumps, alternators, etc. etc. I can do a brake job (pads and rotors) on a car in around an hour now. I even learned how to do wheel alignments using 2 cinder blocks, a tape measure, and some string. Its really not that hard, I just watch a couple of you-tube videos, and buy my parts off Amazon or E-bay. Shop labor prices are ridiculous, and finding an actual honest mechanic is like trying to find a unicorn nowadays.
Hey, 8020 Media. I currently drive a 2000 Subaru Outback wagon with the 2.5L H4 engine in it. I have been having issues since I bought in may with acceleration. About Mid July it sounded like some one stuck a kazoo in my tail pipe. It rattled and made weird sounds and went tink and then started rattling. So, I put a north east exhaust stainless steel glass pack on. Car worked great for two to three weeks since I got it stuck on. The noises and rev hang went away. When I was driving it home from work last night. The car started to chirp and make noises and whistle with acceleration. Once it warmed up, the vehicle shut up and got quiet. Tonight, we had a hell of a rain storm I saw nothing like it at all. I drove through standing water, it was probably four inches deep. I hit the puddle at 25MPH, the car did fine but it bogged down on me. So, after it bogged down I kept the gas pedal mashed so I can keep my RPMS up to keep water out. Then I smelled rotten eggs on the way home after I got out of the puddle. Other then that, car works excellent and no major issues with it. Considering it has 214,000 miles on it. Thanks for the video- WS.
The easiest test for a bad cat is get a infrared temp gun and get the vehicle up to operating temperature and check the temp going into cat and temp going out of cat depending on what readings you get that will tell if the cat is working properly or on its way out or completely toast! Retired mechanic here!
Hello. Thank you for the video. I have a dodge charger that cranks but doesn’t start. I’ve changed all sensors but the 02 sensors. I heard they would be the cause of not starting and that all 4 to go out is uncommon. The only codes I have is for all 4 sensors. Would a bad cat be the cause of no start. Thank you.
......................................I was out with a friend to Loews,,,,,,,,,His truck was very hard to restart ; he came near draining the battery,,,,,,,,He told me this happens when the F-150 got hot,,,,,,,some weeks later it would not start when cold,,,,,,It was towed to a repair shop,,,,,,,and they told him the cat or cats was clogged,,,,,,He bought a newer truck...........................................shit creeps up on things,,,,,,,,,the bad becomes worse after the fact....................
My granddaughter has 2015 Sentra that will not go over 40 and engine will die at stop sign. Advance Auto test said cat converter code showed up. She took to a mechanic who she didn’t know and they said transmission was bad. Any thoughts on next step for her?
Deff take to another mechanic and get another opinion the sounds a bad trans makes are way different from the sounds a bad cat makes the stalling and not going over 40 certainly sounds like your cat I had this issue on my impala except my got so bad that I couldn’t accelerate past 20! So sounds like she could get away with maybe running a bottle of cataclean in the gas tank and see ir that helps clean out the cat at all then if that doesn’t work I’d take to another shop they shouldn’t charge you more then about 500-600 for a cat replacement on that model car
I'll echo what was said by thatstoner (lol). Try a different mechanic - it could be the transmission but that's very unlikely - a clogged cat would be much more likely
@@thatstonerr7738 I took the car to a trusted mechanic and it had 4 transmission faults, pollution control faults. They recommended she trade it in ASAP while it still moves.
@ do you know what that is? And I got home and had a foul smell coming from the car like rotten eggs or fireworks, do you think that’s bad catalytic converters? & how long can I drive with it?
K - Sounds like you do have a cat issue, but that wouldn't cause the parking brake to go on and off. Seems like the wire for the parking brake could be messed up.
Would just test driving with the forward O2 sensor removed stop or noticeably improve the misfire and acceleration low power issue since a lot of the back pressure is a bit relieved? ( Assuming a clogged cat is the problem}
I appreciate you answering the people in the comment section. I have a 2009 MB E350 which runs fine with good power and a steady idle. Nothing seems off. However sometimes when I step on the pedal I get that nasty suplphur smell inside the car. The rpm gauge can also sometimes surge slightly at highway speeds. My engine have some oil consumption. I passed the emission test last year. What do you think?
My trailblazer goes into "Engine power reduced mode" when canceling the Cruise control mode when driving..Could the cat or throttle have something to do with this?@@8020Media
L - Yes, a clogged catalytic converter can cause both the VSA (Vehicle Stability Assist) light and the Check Engine Light (CEL) to turn on. A clogged converter creates excessive backpressure, which can lead to poor engine performance and trigger CEL codes like P0420 (catalyst efficiency below threshold) or codes for misfires and oxygen sensor issues. The VSA light may activate because the system detects reduced engine performance or irregular signals from sensors tied to engine operation. Address the catalytic converter issue promptly, as driving with a clogged converter can damage the engine and exhaust system.
2013 Toyota Camry is throwing out a p2109 throttle body code. The symptoms are loss of power but gradually catches speed. Also burning oil more than usual. Symptoms all point to clogged catalytic converter. Will it throw that code (p2109) as well not the usual p0420 or O2 sensor code. Do you recommend changing throttle body first or Catalytic converter?
How about if ur pressing the brakes but ur vehicle is accelerating alot . Is that a bad catylac converter? Or when I'm driving it randomly excellerates at extreme amounts on its own and I push the brake and it's like im fighting with it to get it to stop because the car pushing accelerate at same time
‘17 VW GTI, DSG Been chasing issues for the last few months. Replaced suction jet pump, charcoal can, evap purge valve, PCV unit. Brand new plugs just two days ago and I’ve been exhibiting a lot of the symptoms of a clogged cat. My issue is my pre cat o2 sensor has been throwing a low voltage code forever and I get no readings from the post cat sensor in OBD11. In live data, I could see the pre cat exhaust temperature reading 80-90 degrees Celsius above what the post cat temperature was reading. I also have very weak flow coming from the tailpipes and have smelled a sulfur/nasty smell a few times over the last few weeks. I also noticed a smell when pulling the coil packs out of the cylinder head, as well as finding some oil around the washer rings of cylinder 2’s spark plug.
@ I haven’t yet, but I’ve gotten a few opinions from a couple shops and they’re all leading to something with the cats. Got a single Hi-flow on the way to replace!
@@OHNOES131 try cleaning the cats, some cars have 2, find the best way to do so, your rings may wear soon if you dont, the blocked pressure from the exhaust by the cat can lead to particles getting into the piston chambers and wear your rings. Cats are total fuckery, when they are getting too hot the vehicle sometimes shut off or just lose power, the readings by the o2 sensor does this, nothing is wrong with your o2 sensor. Just take this as gospel truth clean the cats properly car will be fine, lets hope the rings arent damaged
@ hopefully the rings are good. I’ve actually since this post installed a CTS turbo Dp with the hi flow cat on it, but still having some issues. With light driving the car drives fine, but when I give it good throttle, it chokes up. Also on warm start, it has a bit of a rough start as well. I’m gonna do a carbon cleaning as I’m at 101k and I don’t believe any of the previous owners ever had this done. Also I was running with a faulty PCV unit, and turns out the blow by gasses and hydrocarbons can recycle back through the intake manifold and gunk everything up. If the carbon cleaning doesn’t do the trick, next step is injectors. But after monitoring injector timing, nothing seems out of ordinary. No short term fuel trim either, just sporadic misfires not specific to any cylinder. For instance, last time driving and giving it throttle to pass another car, OBD 11counted 30 misfires on cyl 3 and 8 on cyl 1. Plugs are brand new and all gapped to tune spec, coils are only a year old.
What converter would you recommend because I buy this aftermarket sound like a motorcycle do you think would be better to buy an original converter? I got all those symptoms
Hi ! Im having low power in my first 20-30minute drive but it gets back to normal after that. What should I check ? Thanks . Odo : 35k History : Had misfire issue before ( rat bites in ignition ) But already replaced.
Would a clogged converter cause valve clatter sound when the engine gets hot from the increased back pressure? It gets boggy and then I'll hear the valves when accelerating. I am getting a check engine light for a small fuel leak. Gas cap, purge valve or converter I think is what the code was. Code goes on and off.
M driving ford focus 1.0 ecoboost i keep getting engine light n none of the above problems you mentioned is happening on my car but my mechanic told me that i need to find someone to fix Emmission problem
Hi , please help me figure out what is going on with my Nissan '90 D21. A couple months ago I started noticing an intermittent sound coming from under my truck . Sounds like there is some sort of obstruction in the exhaust system . Like some airway is being partially blocked . When another car pulls up along side of me the sound is returned to me driving along when it bounces back . Today Nov 11 I could hear a beating or popping sound and when I pulled into a parking lot I turned the engine off and back on and the popping shaking of the exhaust & tail pipe was gone from turning the key off . I have noticed a loss of power when trying to acccelerate . I just spent $709 for a diagnosis and they replaced the Intake Manifold gasket , wherever that is , but the noise and exhaust problem did not go away at all . I am 78 year old woman who knows nothing about mechanics of my D21 and need all the help I can get .
@@8020MediaNO, none at all , just a sound that seems to be coming from under truck like an airway is congested , obstructed . then whole exhaust is visibly shaking hard and popping sound coming from tail pipe . , then stops completely after I turn engine off then start up truck again . I have driven it for a full 30 years and this is new .
I have a 2016 Hyundai Tucson and it was drinking to much oil. Engine had to be replaced. Two days later engine light came on and I was told its the catalytic converter. Probably from the bad engine that damage the cat. I tried Cataclean and engine light turned off for a couple of days but turn back on. It runs fine and has a lot of power. I can't afford 3500 to get my catalytic converter replace. I trying to find an affordable place but some mechanics are scandalous. I dont know what to do. Can you give me some tips on what I should do?
Straight pipe it 😂😂 you don’t need em per say if you don’t care about the environment but I do understand depending on what state you have inspections and have to have them but if you don’t just straight pipe it
S - Yes, a bad catalytic converter can cause a rattling noise, especially if the ceramic honeycomb inside has broken apart due to age, overheating, or impact damage. The rattling is typically most noticeable at idle or during acceleration when exhaust flow increases. If the converter is partially clogged, you may also experience loss of power, poor acceleration, increased exhaust backpressure, and even a check engine light (P0420 or similar codes).
Would a hot, warmer than usual floorboard (driver and passenger) be a symptom of a bad/ clogged catalytic converter? Or, would it be a heat shield issue? Thanks
Can adding a cold air intake for 6 months, then putting back in the stock intake cause any of these issues? My check engine light is on, auto zone reader says catalytic converter.
I have a 2014 Sonata. I know all about the junk motors cause mine is junk. With all the same symptoms of a clogged cat...could this possibly be the issue? When it misfires, I hear the lifters clicking and burnt oil blows out the exhaust?
Well...I just bought an 08 Prius from a dealer in SC. 3 days after I got the car the check engine light came on...after maybe 100 miles. The car seems to run fine. No misfires or trouble accelerating. Had the code checked at Advance Auto and OReilly and they say it is the cat converter. I think the dealer re-set the check engine and since it is as is he stuck it on me! However it still runs the same as before the light came on. Oil looks good and the coolant looks fine...no dark fumes from the tail pipe...I don't know. Thinking on just driving it and see what happens next!
@8020Media yes I was getting a check engine light. But so I was watching these yt videos and so I went with the direction and used that cataclean stuff. I poured the whole bottle, rode around for about 30 minutes. And I didn't fill up on gas until yesterday morning, whichwas the morning after i poured the clean in. And let me tell you, that check engine light went off as soon as I filled up on gas. Literally. In doing so, now my jeep ride smoother, my key start works now and now i have no dash lights on.
@@8020Media I was smelling like a sulfur smell when my exhaust was on I pulled the pipes, and then I sunk the cats in laundry detergent and then clean them with brake parts cleaner. Afterwards I put a leaf blower on the pipe air was flowing right through them.
I have a 2005 Civic with a 1.7 L engine. I had the rotten egg smell a while back and I also had a battery with a dead cell. It would still start my car but it would not shift right and my mechanic also said it affected how my cat worked. I am still concerned about the catalytic converter I did put some stuff in there to get it unclogged but I was just wondering if removing the O2 sensor on my Civic would help?
Hi Jake, nice explanation on the catalytic converter. Regarding the car's performance if the Catalytic Converter is bad, can one of the symptoms be that the car shuts down while driving if the AC is turned on?
L - A catalytic converter can cause a car to shut down when it overheats. However, what you are describing points us to the alternator: ruclips.net/video/HKP1vKsIr4g/видео.html
So I was told to replace cat and knock sensor but have none of the issues. I get 25.3 miles per gal, no acceleration issue..My car is a 2016 Honda Pilot please help
Help,When I start my jeep Wrangler, it was very loud, but it’s also loud while I’m driving. I’m thinking it’s the O2 sensor or the catalytic converter.
Thanks ❤, my car is currently in the shop and i already suspected this issue,took it to my main mechanic first after the engine light came on,then he showed me the code of the catalytic,so since i got the work done at another shop,i drove my behind straight to them and let them know...we shall see if they try and tack on more stuff LOL😅🙄🙆🏾♀️
I had my 2019 GMC Sierra worked on by GMC. a lifter was bad causing a ticking noise. They replaced the lifter and a bent push rod. All 8 lifters were replaced and pushrods. I drove it about 20 miles and check engine light came on. Took it back to GMC they said its a bad Cat on bank 2 (same side the initial lifter was bad). is this just a coincidence or could they have done something by mistake
Definitely seems suspect but I don't think a lifter replacement would create any issues with the cat. It could also just be bad O2 sensor and not the cat itself - I wouldn't go paying for an expensive new cat without confirming the cat is clogged or going bad first..
Ive had good success spraying an entire can of carb cleaner into the exhaust before the CATS with the engine running (I drilled a small hole before each of my 2 cats, sealed later w screws). Seems to really clear out blockage! Big jump in performance. I did this again recently after dealing w a LEAN condition from loose/worn oil filler cap and torn, leaking grommet seal on the oil filler tube.
I changed the downstream O2 sensor and it triggered the CAT code. I did the upstream, erased the codes and it came back on. There was stalling while driving and weak acceleration.
I started to smell my cat after 10 min of driving, I started to have misfires out of NOWHERE and may car sounds like it has rolling anti lag. I also have a bigger turbo. Would you say my cat is clogged?
My traverse wouldnt accelerate to get on highway. I pulled over and it started sputtering and died. Restarted sputtered died. Then it started and ran fine. Threw p0430 cat bank 2 code. Any ideas?
My old farm van is spitting and sputtering so went to Auto Zone and hooked up the tester. It is a 2003 Dodge Caravan 6cyl. The initial code PO420. Then. 34,35,442 and 455. I can’t get a straight answer from anybody. Any thoughts. Ty.
idk if u will reply to this but i got a p0305 clyinder 5 misfire and p0446 code, but auto zone recommended i replace the catalytic converter....when at idle it make louder buvv buvv buvv, noticably worse when i go into reverse or go very slow in drive, seems fine in neutral and park have very little vibration and loud buvv buvv buvv. any input would be appreciated friend. I use this truck for work and idk if i can afford a new cat.
T - Don't think you need to replace the cat. Seems like it could be your EVAP system. Check the purge valve and check your ignition components in cylinder 5.
I have a 2015 Hyundai Sonata 2.4L engine, and it has 240k miles on the engine, I had the engine and transmission tested theyre fine, and I replaced the spark plugs, coil packs, throttle body. Accelerating is very slow. It takes a second for the car to get up to speed. I suspect it's the catalytic converter. It's expensive on this vehicle. It's has no codes, and there is a smell that comes from the exhaust. Do you suspect it's the catalytic converter? I change the oil every 3k with full synthetic, and transmission fluid has been serviced regularly. I love this car, and it is a trooper. Most 4 cylinder vehicles dont make it past 200k, and I want to keep this car going. Suggestions?
K - Carbon buildup is possible? Was the loss in acceleration gradual? If not, here's a video that could be helpful: ruclips.net/video/ipjYLPJgpq8/видео.html
The engine repairer changed the testate with a new one which doesn't have the hole of egr valve. I change the catalict with one.the co2 emission failed again.and before 7 years with egr valve on catalict new failed the same
J - Wouldn't say it's really common, but it can happen. We have a video on vehicles losing power that we think might be helpful: ruclips.net/video/ipjYLPJgpq8/видео.html
Bro I can’t tell someone please help me Evertime my truck has been sittin for a min and the exhaust cools off I’ll hear a lot of rattling coming from the middle of the exhaust close to my cats but after a it warms up and I drive away it doesn’t do it anymore
@@8020Media no I’ve looked at it my cats are rattling from the inside I just got back home and now my truck is losing power and doesn’t wanna go up hills I need help
Explain one thing to me please. Since the cat is there to convert poisonous gases to green gasses why would the o2 sensor read xcess o2 when the cat is not there or not working
I am not exhibiting any signs of a bad cat other than the temperature before the cat is hotter than after the cat. No power loss, o2 sensors seem to be working fine, I don't think I have any exhaust leak. Recently replaced cats but P0420 and 0430 came back. Any idea what else I should check for?
I been driving my G37 and when I hit the gas pedal to the metal, there is a nasty smell but it doesn't smell like burned fuel. It's a different kind of smell and I only notice it when I step on the gas pedal kinda hard. Do you think it's because of my cats going bad?
One thing about some of t diy projects for cleaning out the cat that I have noticed is going to be a killer. Some people have tried using a strong kind of chemical or caustic solution, which is a good thing for a dirty motor but is an electrolyte in a cat converter. They use different rare earth metals that will electroplate another. The End. Use something that won't do that.
I special ordered a catalytic converter from Napa Auto parts to replace the catalytic converter a month later my catalytic converter light still came back on. So now what?
No. It only indicates that the sensor output suggests cat efficiency has dropped below 95%. It has no way of knowing why. There are eight or ten reasons why the downstream sensor might throw a P0420 code; only one reason might be a failed cat. And a 'clogged' cat is not the same thing. That results in seriously impaired car performance, noticeable to any driver.
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Signs of a bad cat: Your local crackhead took it off your Prius
K - Definitely a possibility. XD
I resent that. I have a cat, and she's not a crackhead. j/k
I was working in the LBC some years ago. This girl got in her Prius and as soon as she started it you could tell her cat was gone. Felt bad for her
Hey! They're not 'crackheads' any more. Get with the times. Now we call them 'people suffering from substance use disorder'. Doesn't that have a nicer, friendlier sound to it?
@@KevinMaxwell-o3t ..........................yeah,,,,,its all jellyback rainbow....lifestyles........................................................
The purpose of the catalytic converter is not to reduce carbon DIoxide (CO2). In fact if the catalytic converter works, the compounds that it is intended to reduce (mainly carbon MONoxide and hydrocarbons are converted to carbon dioxide, so this gas actually increases in the exhaust.
K - Yes, we misspoke. Thanks for sharing this insight!
@@8020Media ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,poor freakin editing by someone............................reread what you write,,,,,to insure it is right.................misspoke,,,,LOL...when i aim correctly ; i never miss a poke..............................
The cat also converts toxic nitrogen compounds into nitrogen that isn't toxic. That's the main reason for it.
Be careful who replaces the part. My catalytic converter was stolen off an 2005 Tundra happens to have 2 Took it to BIG O TIRE shop in Bakersfield Ca they sublet the work to BOBS Mufflers picked up my truck when it was ready they forgot invoice from BOBS in my truck for $1800.00. Big O Tire charged me $4800.00 File complaint with BAR they investigated the only thing they did wrong was not disclosing the job was being sublet to BOBS. I got stuck with the bill so dont take car to a shop that is not a MUFFLER SHOP. My friend did worst she was screwed by a smog shop $5400.00 to replace them on a JEEP.
T - Thanks for sharing this insight. This has certainly been a big issue..
F - Not everyone has the automotive skill to do so..
I've learned how to do repairs myself, i have done wheel bearings, control arms, brake pads, rotors, water pumps, alternators, etc. etc.
I can do a brake job (pads and rotors) on a car in around an hour now. I even learned how to do wheel alignments using 2 cinder blocks, a tape measure, and some string.
Its really not that hard, I just watch a couple of you-tube videos, and buy my parts off Amazon or E-bay.
Shop labor prices are ridiculous, and finding an actual honest mechanic is like trying to find a unicorn nowadays.
Yeah good luck welding.@FrogUniverse
Mine too
Hey, 8020 Media. I currently drive a 2000 Subaru Outback wagon with the 2.5L H4 engine in it. I have been having issues since I bought in may with acceleration. About Mid July it sounded like some one stuck a kazoo in my tail pipe. It rattled and made weird sounds and went tink and then started rattling. So, I put a north east exhaust stainless steel glass pack on. Car worked great for two to three weeks since I got it stuck on. The noises and rev hang went away. When I was driving it home from work last night. The car started to chirp and make noises and whistle with acceleration. Once it warmed up, the vehicle shut up and got quiet. Tonight, we had a hell of a rain storm I saw nothing like it at all. I drove through standing water, it was probably four inches deep. I hit the puddle at 25MPH, the car did fine but it bogged down on me. So, after it bogged down I kept the gas pedal mashed so I can keep my RPMS up to keep water out. Then I smelled rotten eggs on the way home after I got out of the puddle. Other then that, car works excellent and no major issues with it. Considering it has 214,000 miles on it. Thanks for the video- WS.
W - Sorry to hear this. However, thanks for taking the time to share your experience!
The easiest test for a bad cat is get a infrared temp gun and get the vehicle up to operating temperature and check the temp going into cat and temp going out of cat depending on what readings you get that will tell if the cat is working properly or on its way out or completely toast! Retired mechanic here!
M - Thanks for taking the time to share your experience and knowledge!
So how much hotter would it be coming out typically?
Hello. Thank you for the video. I have a dodge charger that cranks but doesn’t start. I’ve changed all sensors but the 02 sensors. I heard they would be the cause of not starting and that all 4 to go out is uncommon. The only codes I have is for all 4 sensors. Would a bad cat be the cause of no start. Thank you.
D - This video will help your research: ruclips.net/video/0YRdzJbHcm4/видео.html
......................................I was out with a friend to Loews,,,,,,,,,His truck was very hard to restart ; he came near draining the battery,,,,,,,,He told me this happens when the F-150 got hot,,,,,,,some weeks later it would not start when cold,,,,,,It was towed to a repair shop,,,,,,,and they told him the cat or cats was clogged,,,,,,He bought a newer truck...........................................shit creeps up on things,,,,,,,,,the bad becomes worse after the fact....................
My granddaughter has 2015 Sentra that will not go over 40 and engine will die at stop sign. Advance Auto test said cat converter code showed up. She took to a mechanic who she didn’t know and they said transmission was bad. Any thoughts on next step for her?
Deff take to another mechanic and get another opinion the sounds a bad trans makes are way different from the sounds a bad cat makes the stalling and not going over 40 certainly sounds like your cat I had this issue on my impala except my got so bad that I couldn’t accelerate past 20! So sounds like she could get away with maybe running a bottle of cataclean in the gas tank and see ir that helps clean out the cat at all then if that doesn’t work I’d take to another shop they shouldn’t charge you more then about 500-600 for a cat replacement on that model car
I'll echo what was said by thatstoner (lol). Try a different mechanic - it could be the transmission but that's very unlikely - a clogged cat would be much more likely
@@thatstonerr7738 I took the car to a trusted mechanic and it had 4 transmission faults, pollution control faults. They recommended she trade it in ASAP while it still moves.
R - Not a bad call unfortunately.
Cetacean does not work. It only help along the wall of the converter. I paid $30 for absolutely nothing. The mechanic told me after I used it.
Does it affect braking system? My parking brake keeps cutting on and off everytime I come to a stop
K - Not likely.
@ do you know what that is? And I got home and had a foul smell coming from the car like rotten eggs or fireworks, do you think that’s bad catalytic converters? & how long can I drive with it?
K - Sounds like you do have a cat issue, but that wouldn't cause the parking brake to go on and off. Seems like the wire for the parking brake could be messed up.
Would just test driving with the forward O2 sensor removed stop or noticeably improve the misfire and acceleration low power issue since a lot of the back pressure is a bit relieved? ( Assuming a clogged cat is the problem}
H - We have a video on O2 Sensors that we think would be helpful here: ruclips.net/video/hpqXLGAE4Xo/видео.html
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,thanks,,,,,,,,did not think of the obvious test.........................................
I appreciate you answering the people in the comment section. I have a 2009 MB E350 which runs fine with good power and a steady idle. Nothing seems off. However sometimes when I step on the pedal I get that nasty suplphur smell inside the car. The rpm gauge can also sometimes surge slightly at highway speeds. My engine have some oil consumption. I passed the emission test last year. What do you think?
A - Based on the smell, it could be your cat getting clogged.
Would a bad catalytic converter affect the throttle body and mass air flow sensor?
B - It certainly can!
My trailblazer goes into "Engine power reduced mode" when canceling the Cruise control mode when driving..Could the cat or throttle have something to do with this?@@8020Media
Will your VSA light and Check engine light go on when the catalytic converter is clogged
L - Yes, a clogged catalytic converter can cause both the VSA (Vehicle Stability Assist) light and the Check Engine Light (CEL) to turn on. A clogged converter creates excessive backpressure, which can lead to poor engine performance and trigger CEL codes like P0420 (catalyst efficiency below threshold) or codes for misfires and oxygen sensor issues. The VSA light may activate because the system detects reduced engine performance or irregular signals from sensors tied to engine operation. Address the catalytic converter issue promptly, as driving with a clogged converter can damage the engine and exhaust system.
@@8020Media thank you for insight
2013 Toyota Camry is throwing out a p2109 throttle body code. The symptoms are loss of power but gradually catches speed. Also burning oil more than usual. Symptoms all point to clogged catalytic converter. Will it throw that code (p2109) as well not the usual p0420 or O2 sensor code. Do you recommend changing throttle body first or Catalytic converter?
I would try cleaning the throttle body first and seeing if that does anything, but agreed that sounds a lot more like a cat.
Its a toyota it already has loss of power straight out of the factory 😂😂
XD
How about if ur pressing the brakes but ur vehicle is accelerating alot . Is that a bad catylac converter? Or when I'm driving it randomly excellerates at extreme amounts on its own and I push the brake and it's like im fighting with it to get it to stop because the car pushing accelerate at same time
N - This video may be helpful for you: ruclips.net/video/x0iXXAdB0og/видео.html
‘17 VW GTI, DSG
Been chasing issues for the last few months. Replaced suction jet pump, charcoal can, evap purge valve, PCV unit. Brand new plugs just two days ago and I’ve been exhibiting a lot of the symptoms of a clogged cat. My issue is my pre cat o2 sensor has been throwing a low voltage code forever and I get no readings from the post cat sensor in OBD11. In live data, I could see the pre cat exhaust temperature reading 80-90 degrees Celsius above what the post cat temperature was reading. I also have very weak flow coming from the tailpipes and have smelled a sulfur/nasty smell a few times over the last few weeks. I also noticed a smell when pulling the coil packs out of the cylinder head, as well as finding some oil around the washer rings of cylinder 2’s spark plug.
O - Sounds like a cat issue to us! Have you taken it to a mechanic?
@ I haven’t yet, but I’ve gotten a few opinions from a couple shops and they’re all leading to something with the cats. Got a single Hi-flow on the way to replace!
O - Keep us updated!
@@OHNOES131 try cleaning the cats, some cars have 2, find the best way to do so, your rings may wear soon if you dont, the blocked pressure from the exhaust by the cat can lead to particles getting into the piston chambers and wear your rings.
Cats are total fuckery, when they are getting too hot the vehicle sometimes shut off or just lose power, the readings by the o2 sensor does this, nothing is wrong with your o2 sensor.
Just take this as gospel truth clean the cats properly car will be fine, lets hope the rings arent damaged
@ hopefully the rings are good. I’ve actually since this post installed a CTS turbo Dp with the hi flow cat on it, but still having some issues. With light driving the car drives fine, but when I give it good throttle, it chokes up. Also on warm start, it has a bit of a rough start as well. I’m gonna do a carbon cleaning as I’m at 101k and I don’t believe any of the previous owners ever had this done. Also I was running with a faulty PCV unit, and turns out the blow by gasses and hydrocarbons can recycle back through the intake manifold and gunk everything up. If the carbon cleaning doesn’t do the trick, next step is injectors. But after monitoring injector timing, nothing seems out of ordinary. No short term fuel trim either, just sporadic misfires not specific to any cylinder. For instance, last time driving and giving it throttle to pass another car, OBD 11counted 30 misfires on cyl 3 and 8 on cyl 1. Plugs are brand new and all gapped to tune spec, coils are only a year old.
What converter would you recommend because I buy this aftermarket sound like a motorcycle do you think would be better to buy an original converter? I got all those symptoms
C - What vehicle do you have?
@@8020Mediasame question for 2010 chevrolet equinox ltz
Thank you. You mentioned the info that I was looking for.
M - Thanks for the feedback! We hope it was helpful.
Hi ! Im having low power in my first 20-30minute drive but it gets back to normal after that. What should I check ? Thanks .
Odo : 35k
History : Had misfire issue before ( rat bites in ignition ) But already replaced.
R - We think this video may be helpful for you: ruclips.net/video/ipjYLPJgpq8/видео.html
Ig you stated the readings before and after cat but what about the center sensor? What should that be reading in relativity of sensors 1 and 3
Would a clogged converter cause valve clatter sound when the engine gets hot from the increased back pressure? It gets boggy and then I'll hear the valves when accelerating. I am getting a check engine light for a small fuel leak. Gas cap, purge valve or converter I think is what the code was. Code goes on and off.
F - Certainly possible. Try to get the code when the check engine light is on and check back. Hard to diagnose without a code
M driving ford focus 1.0 ecoboost i keep getting engine light n none of the above problems you mentioned is happening on my car but my mechanic told me that i need to find someone to fix Emmission problem
B - Do you happen to know what engine codes you are getting?
Hi , please help me figure out what is going on with my Nissan '90 D21. A couple months ago I started noticing an intermittent sound coming from under my truck . Sounds like there is some sort of obstruction in the exhaust system . Like some airway is being partially blocked . When another car pulls up along side of me the sound is returned to me driving along when it bounces back . Today Nov 11 I could hear a beating or popping sound and when I pulled into a parking lot I turned the engine off and back on and the popping shaking of the exhaust & tail pipe was gone from turning the key off . I have noticed a loss of power when trying to acccelerate . I just spent $709 for a diagnosis and they replaced the Intake Manifold gasket , wherever that is , but the noise and exhaust problem did not go away at all . I am 78 year old woman who knows nothing about mechanics of my D21 and need all the help I can get .
B - Sorry to hear this! Are you getting a check engine light?
@@8020MediaNO, none at all , just a sound that seems to be coming from under truck like an airway is congested , obstructed . then whole exhaust is visibly shaking hard and popping sound coming from tail pipe . , then stops completely after I turn engine off then start up truck again . I have driven it for a full 30 years and this is new .
B - It definitely sounds like there could be something going on with the catalytic converter. Keep us updated!
San jose California hoping you are near by so I can help whatever I can.
I have a 2016 Hyundai Tucson and it was drinking to much oil. Engine had to be replaced. Two days later engine light came on and I was told its the catalytic converter. Probably from the bad engine that damage the cat. I tried Cataclean and engine light turned off for a couple of days but turn back on. It runs fine and has a lot of power. I can't afford 3500 to get my catalytic converter replace. I trying to find an affordable place but some mechanics are scandalous. I dont know what to do. Can you give me some tips on what I should do?
Straight pipe it 😂😂 you don’t need em per say if you don’t care about the environment but I do understand depending on what state you have inspections and have to have them but if you don’t just straight pipe it
Would a bad cat make a rattling noise ?
S - Yes, a bad catalytic converter can cause a rattling noise, especially if the ceramic honeycomb inside has broken apart due to age, overheating, or impact damage. The rattling is typically most noticeable at idle or during acceleration when exhaust flow increases. If the converter is partially clogged, you may also experience loss of power, poor acceleration, increased exhaust backpressure, and even a check engine light (P0420 or similar codes).
@ would you recommend me replacing the cats or hallowing it out
Would a hot, warmer than usual floorboard (driver and passenger) be a symptom of a bad/ clogged catalytic converter? Or, would it be a heat shield issue? Thanks
F - It more than likely is heat shield related.
Can adding a cold air intake for 6 months, then putting back in the stock intake cause any of these issues?
My check engine light is on, auto zone reader says catalytic converter.
L - Not likely.
U forget to plug everything into intake
I have a 2014 Sonata. I know all about the junk motors cause mine is junk. With all the same symptoms of a clogged cat...could this possibly be the issue? When it misfires, I hear the lifters clicking and burnt oil blows out the exhaust?
F - Certainly could be! Any engine codes?
@@8020MediaInitially, but the mechanic that works for the place I bought it, cleared it. It's no longer coming on
F - Well that's good! Hopefully it stays off.
Well...I just bought an 08 Prius from a dealer in SC. 3 days after I got the car the check engine light came on...after maybe 100 miles. The car seems to run fine. No misfires or trouble accelerating. Had the code checked at Advance Auto and OReilly and they say it is the cat converter. I think the dealer re-set the check engine and since it is as is he stuck it on me! However it still runs the same as before the light came on. Oil looks good and the coolant looks fine...no dark fumes from the tail pipe...I don't know. Thinking on just driving it and see what happens next!
F - Sorry to hear this.. Did you get a warranty?
I love watching these vids at 2X playback speed. Good info!
A - Thanks for the feedback.
My engine was running and my gas pedal went all the way down but no acceleration. Auto zone said possibly cat conv. Can anyone help?
S - Are you getting a check engine light?
@8020Media yes I was getting a check engine light. But so I was watching these yt videos and so I went with the direction and used that cataclean stuff. I poured the whole bottle, rode around for about 30 minutes. And I didn't fill up on gas until yesterday morning, whichwas the morning after i poured the clean in. And let me tell you, that check engine light went off as soon as I filled up on gas. Literally. In doing so, now my jeep ride smoother, my key start works now and now i have no dash lights on.
S - Awesome! Glad to hear your solved the problem.
@@8020Media and appreciate you responding to begin with🙏
1990 car with stock cats should I replace ?
I - You should check them beforehand, if possible. Typically they aren't cheap. Are you having any issues? or just suspecting they are bad?
@@8020Media I was smelling like a sulfur smell when my exhaust was on I pulled the pipes, and then I sunk the cats in laundry detergent and then clean them with brake parts cleaner. Afterwards I put a leaf blower on the pipe air was flowing right through them.
L - How'd it turn out? Sounds like an interesting technique.
I have a 2005 Civic with a 1.7 L engine. I had the rotten egg smell a while back and I also had a battery with a dead cell. It would still start my car but it would not shift right and my mechanic also said it affected how my cat worked. I am still concerned about the catalytic converter I did put some stuff in there to get it unclogged but I was just wondering if removing the O2 sensor on my Civic would help?
J - Not likely, sounds like you may want to check on your cat. Are you getting any engine codes?
Hi Jake, nice explanation on the catalytic converter. Regarding the car's performance if the Catalytic Converter is bad, can one of the symptoms be that the car shuts down while driving if the AC is turned on?
L - A catalytic converter can cause a car to shut down when it overheats. However, what you are describing points us to the alternator: ruclips.net/video/HKP1vKsIr4g/видео.html
What about a nocking sound from underneath the engine?
L - We have a whole video dedicated to engine knock, we hope this helps in your research: ruclips.net/video/GeA4o7Yo_q4/видео.html
My 2013 TDI premium Jetta is going through the same problem,, can you tell me to cheap way to handle it ??
P - We go over fixes in the video.
@@8020Mediadidn't see any fixes, just tests....
Great explanation and sugestions
A - Thanks for the feedback! We hope it was helpful.
So I was told to replace cat and knock sensor but have none of the issues. I get 25.3 miles per gal, no acceleration issue..My car is a 2016 Honda Pilot please help
M - Were you told to do so because of an engine code?
Help,When I start my jeep Wrangler, it was very loud, but it’s also loud while I’m driving. I’m thinking it’s the O2 sensor or the catalytic converter.
T - Could be. Are you getting a check engine light?
Thanks ❤, my car is currently in the shop and i already suspected this issue,took it to my main mechanic first after the engine light came on,then he showed me the code of the catalytic,so since i got the work done at another shop,i drove my behind straight to them and let them know...we shall see if they try and tack on more stuff LOL😅🙄🙆🏾♀️
T - Hope they don't screw you over! Keep us updated.
I had my 2019 GMC Sierra worked on by GMC. a lifter was bad causing a ticking noise. They replaced the lifter and a bent push rod. All 8 lifters were replaced and pushrods. I drove it about 20 miles and check engine light came on. Took it back to GMC they said its a bad Cat on bank 2 (same side the initial lifter was bad). is this just a coincidence or could they have done something by mistake
Definitely seems suspect but I don't think a lifter replacement would create any issues with the cat. It could also just be bad O2 sensor and not the cat itself - I wouldn't go paying for an expensive new cat without confirming the cat is clogged or going bad first..
Can using diesel oil in a gasoline, ran vehicle, cause your Cadillac converter to clog
D - It most certainly can damage the cats.
Ive had good success spraying an entire can of carb cleaner into the exhaust before the CATS with the engine running (I drilled a small hole before each of my 2 cats, sealed later w screws). Seems to really clear out blockage! Big jump in performance. I did this again recently after dealing w a LEAN condition from loose/worn oil filler cap and torn, leaking grommet seal on the oil filler tube.
A - Thanks for taking the time to share your experience!
Is the catalytic converter can also cause the engine oil burning faster than usual?
P - It is possible.
I think you meant it is supposed to reduce carbon monoxide and nitrogen oxide (NOx) gases, not carbon dioxide.
S - yes, thanks.
I changed the downstream O2 sensor and it triggered the CAT code. I did the upstream, erased the codes and it came back on. There was stalling while driving and weak acceleration.
U - We have heard of this happening before unfortunately.. Are you getting any other engine codes?
@@8020Media still O2 sensor codes , evap, every code knows how to trigger for an oil change 😅
I started to smell my cat after 10 min of driving, I started to have misfires out of NOWHERE and may car sounds like it has rolling anti lag. I also have a bigger turbo. Would you say my cat is clogged?
R - Are you getting any check engine lights or codes?
My traverse wouldnt accelerate to get on highway. I pulled over and it started sputtering and died. Restarted sputtered died. Then it started and ran fine. Threw p0430 cat bank 2 code. Any ideas?
D - May want to check O2 sensor/s or cat.
Can a bad Catalytic converter cause a car to go into limp mode without showing any codes?
F - Very possible!
Yes I believe so
My old farm van is spitting and sputtering so went to Auto Zone and hooked up the tester. It is a 2003 Dodge Caravan 6cyl. The initial code PO420. Then. 34,35,442 and 455. I can’t get a straight answer from anybody. Any thoughts. Ty.
S - How many miles does it have? Guessing you're saying P0034, P0035, P0442, and P0455?
idk if u will reply to this but i got a p0305 clyinder 5 misfire and p0446 code, but auto zone recommended i replace the catalytic converter....when at idle it make louder buvv buvv buvv, noticably worse when i go into reverse or go very slow in drive, seems fine in neutral and park have very little vibration and loud buvv buvv buvv. any input would be appreciated friend. I use this truck for work and idk if i can afford a new cat.
T - Don't think you need to replace the cat. Seems like it could be your EVAP system. Check the purge valve and check your ignition components in cylinder 5.
What about the p0420 code???
T - This can lead to a catalytic converter, yes.
What about a loud start up and it sounds normal after a while
B - Do you have an aftermarket exhaust?
@@8020Mediayup they got my cat 3 months ago they told me an aftermarket piece can last me a year for now
Stole my cat smh
B - Damn..
I have a 2015 Hyundai Sonata 2.4L engine, and it has 240k miles on the engine, I had the engine and transmission tested theyre fine, and I replaced the spark plugs, coil packs, throttle body. Accelerating is very slow. It takes a second for the car to get up to speed. I suspect it's the catalytic converter. It's expensive on this vehicle. It's has no codes, and there is a smell that comes from the exhaust. Do you suspect it's the catalytic converter? I change the oil every 3k with full synthetic, and transmission fluid has been serviced regularly. I love this car, and it is a trooper. Most 4 cylinder vehicles dont make it past 200k, and I want to keep this car going. Suggestions?
K - Carbon buildup is possible? Was the loss in acceleration gradual? If not, here's a video that could be helpful: ruclips.net/video/ipjYLPJgpq8/видео.html
@8020Media It's been gradual
K - Could be carbon buildup or a clogged converter
Thank you. Good information. Kind regards.
L - Thanks for the feedback! We hope it was helpful.
Is there any way to clean it
J - you can, but may not always be the best solution.
The engine repairer changed the testate with a new one which doesn't have the hole of egr valve. I change the catalict with one.the co2 emission failed again.and before 7 years with egr valve on catalict new failed the same
It's a vw lupo 1.0 year 2001
A - Are you getting any engine codes?
Is this really common on a 2007 gmc yukon and if so can I take off the o2 sensor? Literally doesn't pick up speed..
J - Wouldn't say it's really common, but it can happen. We have a video on vehicles losing power that we think might be helpful: ruclips.net/video/ipjYLPJgpq8/видео.html
IT WOULDN'T THROW A 0421 " EGR " CODE ?????
A - What?
Bro I can’t tell someone please help me Evertime my truck has been sittin for a min and the exhaust cools off I’ll hear a lot of rattling coming from the middle of the exhaust close to my cats but after a it warms up and I drive away it doesn’t do it anymore
P - So it rattles at idle? Have you checked if the piping is just hitting each other?
@@8020Media no I’ve looked at it my cats are rattling from the inside I just got back home and now my truck is losing power and doesn’t wanna go up hills I need help
P - Sounds like a problem with your catalytic converter than. It could be clogged.
My hhr rattles too at the cat and it also sometimes has a tough time starting
A - You could be experiencing the same thing.
Explain one thing to me please. Since the cat is there to convert poisonous gases to green gasses why would the o2 sensor read xcess o2 when the cat is not there or not working
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,excuse me,,,, i misspoke..........................................
I am not exhibiting any signs of a bad cat other than the temperature before the cat is hotter than after the cat. No power loss, o2 sensors seem to be working fine, I don't think I have any exhaust leak. Recently replaced cats but P0420 and 0430 came back. Any idea what else I should check for?
Do cat con cleaners actually work?
M - Depends on the severity of the clog, but yes.
great Video!👏
T - Thanks for the feedback! We hope it was helpful.
I been driving my G37 and when I hit the gas pedal to the metal, there is a nasty smell but it doesn't smell like burned fuel. It's a different kind of smell and I only notice it when I step on the gas pedal kinda hard. Do you think it's because of my cats going bad?
O - Could be. Getting any engine codes or check engine lights?
@@8020Media No engine light and no codes. I been told that it might be my gas pedal but who knows.
O - The gas pedal wouldn't cause a bad smell. It's likely the cat.
Trust me, same thing going on with me. I been looking for 7 months.. it’s the cats just found it out at the shop. 2013 g37
H - Thanks for sharing your experience!
Rotten egg smells could be caused by the MAF sensor.
A - Certainly possible.
I had that same smell right in my trunk 2010 BMW
I still can’t figure out
B - Are you getting any engine codes? MAF, Catalytic converter, battery, or o2 sensor can cause this.
Update
I just found out spark plug #3 is shot and #5 coils is bad later on I will change all my spark plugs and that one coil see what happens 🙏🏼🙏🏼
One thing about some of t diy projects for cleaning out the cat that I have noticed is going to be a killer. Some people have tried using a strong kind of chemical or caustic solution, which is a good thing for a dirty motor but is an electrolyte in a cat converter. They use different rare earth metals that will electroplate another. The End. Use something that won't do that.
L - Thanks for the insight.
I special ordered a catalytic converter from Napa Auto parts to replace the catalytic converter a month later my catalytic converter light still came back on.
So now what?
E - What vehicle do you have? What engine codes do you have?
I also was hearing a "ticking" sound when i opened my hood💀💀💀👀
T - Keep us updated here!
Seafoam the part and new sensors
A - Doesn't always do the trick.
Ap0420 code is a clogged cat.
M - Not always, but most of the time, sure.
No. It only indicates that the sensor output suggests cat efficiency has dropped below 95%. It has no way of knowing why. There are eight or ten reasons why the downstream sensor might throw a P0420 code; only one reason might be a failed cat. And a 'clogged' cat is not the same thing. That results in seriously impaired car performance, noticeable to any driver.
K - "Not always". But thanks for sharing the insight.
why are you wearing a backward cap, and especially inside, and its not the sixties cut your hair,
G - Why are you coming to the comment section attacking us? Deflecting? Compensating?