This dude reminds me of my old Boss Hogan. I went to work for him right after I got out of college for mechanics. I went in already having been fixing vehicles for friends and myself, didn't learn as much as I hoped (especially after the money) but I learned SOOO much from Hogan so quickly. Seriously, when I say reminds, I mean basically is. They even look similar. I hope he is doing well, haven't talked to him in many years. Guy took me in like family.
Had 6 codes cleared them all, changed the oil, transmission fluid, spark plugs, air intake, cleaned egr, changed the evap cleaned all the stuck carbon out of the manifold including removing the sensor and cleaning that port out as well. Test drove a million times and still the same issue and no check engine light and I almost lost my mind until I watched this. Even though I havent done it yet, I know this is my problem through your explanation that ive been looking for over 22 web pages. Great job and thank alot for the help. Subscribed!
@@MuscleCarMike it actually turned out to be a bad bearing in my transmission so I had to get a new one. But hey, after doing all that work feel like I got a brand new car! 🤷🏾♂️💯
Man I went through the same. This is on my 2005 buick lesabre. Fuel pump, fuel filter, plugs, wires, coils, fuel injectors, egr valve, mass air flow sensor, upstream and downstream o2 sensors, battery, alternator, and lastly the valve cover gasket(just needed it) I'm trying one last thing before I replace the entire exhaust (rockauto $360) and that's the fuel pressure regulator. Before any of that I'm going to loosen the exhaust manifold and just see because of this video. Problem is the random misfire code and flashing check engine light...
Had the same problem on my 03 impala. Was throwing codes that made no sense and even clearing them while backfiring and no power. Super hot out the exhaust with no air coming out. Drove 1000miles and barley made it to my destination. Replaced it and "WOW"
Thanks so much. My car has the same exact issue. Two places told me I need a new transmission. But the trans shop I went to today said it's an exhaust issue and you are confirming that. Subscribed !
Thats great analysis. I suspect the same in my Camry 2005. It's blowing a lot of air from oil cap, and it sounds like exhaust when I open the oil cap in the valve cover. No smoke, no check engine light, PCV valve and hose are new. There was an exhaust leak just before the cat converter, and I just repaired that leak. I didn't check the oil cap before fixing the exhaust leak, but my guess is that engine is not able to breath from exhaust, and as a result the pressure is building up inside the engine, and releases any where it can. In this case it's the valve cover. I also noticed that in idle if I cover the exhaust tail pipe by hand, the engine does not die or even struggle. Unfortunately I cannot disconnect my exhaust easily. Someone removed the flange and welded it to the pipe permanently. Thanks for sharing your analysis. Subscribed.
This is what's happening to my car, I have a 2003 mazda protege. People say it was my transmission, ot turned out to be the catalytic converter. Thank you for this video👍
Thank you for your time. i replaced a clogged cat 4 years ago and today i just noticed the loss of power symptom im using an aftermarket one and i guess it is clogging again.
Keep posting videos like this one! Diagnosing problems the on cars can be harder than the actual work sometimes. All your videos should be "How to idenitfy a bad ...." in my opinion or at least have a playlist of the most common problems. Looks like your going to pass 130k on this one and from the looks of it your other videos don't have many views. Stick with what's working and you'll get there. Great job on this one!
YO I am so thankful you made this video I’m driving a 2017 dodge journey with no check engine light on and I’ve change the spark plugs boots and oil change even had my o2 censors be replaced and it still did this and is still doing it now finally I have something to show to the mechanic to give them a better understanding thank you so DAMN much fr fr These dodge journeys have all types of issues I swear smh
This is the video that I was looking for. This mechanic is awesome. My 2013 Buick Lacrosse is doing the same exact thing. It runs like a dream until yesterday it started jerking as if my transmission was going bad. My computer reader reveals it was the MAF sensor. I changed it, and the problem still didn't go away. Fortunately, my mechanic was able to disconnect one of the oxygen sensors, and the car started to regain its full performance.
Glad I found this video, bought a 2001 Ford ranger 3.0 v6 a month ago & notice it’s mighty quite & when I try to floor it , does that same as that 4Runner
This is going on with my vehicle I have a 1999 Chrysler LHS just reach 200,000 MI I know it's my catalytic converter I seen cherry red like fire and I smell and see smoke I have rough idling on takeoff but I did not push it past 50 MPH. My check engine light came on but I also have to replace my alternator. Took my car to O'Reilly's can I scan for a code but it showed nothing. I'm going to start with my catalytic converter 1,000 % sure that is clogged. Great video easy to understand keep up the good work
My man, thanks a bunch. You've helped me confirm my suspicion with my 3v Mustang GT. No jerking or struggling while accelerating, but definitely, like you said, very little air coming out the exhausts (almost no air at all). I also run a burble/popcorn tune, so, yeh...Plus orange hot cats when climbing around the mountains. Plus bad smell especially on cold start and all the time basically. I've also got an up and down idle but I believe that's because of a bad water pump? Lots of evidence of coolant coming out from below the pump. Haven't done any vacuum leak tests though. Thanks again for the awesome video.
I have a problem with mine that I'm thinking is cat it almost seems like the timing is off one side must be clogged pretty bad bc I have misfires on one hole side of the engine
Thank you so much! This helped me figure out whats wrong with my car after multiple mechanics couldn't find anything since I have no codes. We need more like you!
It's look very easy isn't it but taking many people to figure out and some people still don't have a clues what's going on. Lol 😆 🤣 now please help me subscribe to my channel ok 👍 thanks
Ive been suspecting my Cat being the issue, this video will help me make a solid diagnosis. just keep doing what you do. don't worry about how many subscribers you have now, the more you put out the more will come. stay consistent and dont quit. the world needs RUclips Professors like you!
My 2003 Dodge Caravan with 158,000 miles, got P0420 code. Lugs bad on grades. Barely making it up losing speed from 40 to 25 mph by the summit. Runs fine on the level. But runs hotter than usual but not overheating. Replacing cat tomorrow.
Thank you so much for making this video. I have a 99 Jimmy and it is acting just as you described. I have to push it and push it to maintain 100 km on the freeway. Yesterday, initially, I barely made it over a hill close to home. I had it floored and would hardly go over maybe about 20 mph. I was thinking maybe a problem with the injectors but after watching your video I am convinced it is most likely a clogged cat. Maybe debris from the cat has also travelled farther down steam and possibly caused a blockage in the muffler too. I have a scan tool the reads live data so I can also check the O2 sensors and I will purchase a new vacuum gauge also so I can see how the engine is breathing. Like you said that it is like trying to run with your hand over your mouth. ( I had a vacuum gauge but it is missing in action. ) Thank you so much and I am now SUBSCRIBED!!
laser temp reader. They're like $20 and if the cat is plugged it's hotter upstream (closer to the engine) than it is downstream. When a cat works properly it should be hotter downstream. I dumped sea foam into mine after removing the upstream O2 sensor into the cat and it cleaned it up.
@@FranciscoJavierOutdoors Its not a product made to clean cats. It worked for me and it's worked for others. Upstream was hotter than down while clogged. Ran the seafoam through and the down started reading hotter, like over 100 degree difference. I was told it might break down the honey comb eventually but had nothing to lose by doing it. If the honey comb breaks down I'll be back to where I was. There are also varying degrees of clogged. Mine was clogged enough to trip a code and show temps of being clogged, but it wasn't clogged bad enough to effect driving (there are two cats).
just the other day i had a 1991 chevy s10 with the 4.3l v6, no fire up condition they brought me a timing set told me to change it.. first thing i checked the timing it was perfect! so i checked for fuel, had fuel. no spark, i told the customer about it. had him take the coil pack to oreillys tested good, so when he came back i had taken the ICM out of the distributor had him test it. and it failed!, put a new one in and she fired right up!! happiest customer i have had in a loooong time!! saved him alot of money!
You can test it with a back pressure gauge . There is also a test with a vacuum gauge . If you have a very advanced scan tool , there is a volumetric efficiency test . Otherwise , disconnect it and drive it to test .
@@gabrielsierra6890 I believe you put the gauge on a MANIFOLD vacuum line . Use the brake booster . Raise the RPM up to about 2000 . Instead of stabilizing to about 17 - 22 lbs. , it is much lower because it is restricted and not breathing . It could be a clogged CAT or exhaust . Make sure the air filter isn't clogged . The engine is an air pump . Air goes in and has to go out . I think there are a few videos on You Tube . A back pressure gauge goes into the front O2 hole . That is measuring the back pressure in the exhaust system . You also can remove the front O2 and find the car improves because you are allowing the back pressure to escape . If dual exhaust , remove both O2's or test one at a time .
This video helped a lot. All we could think about when we faced the same problem was a malfunctioning ECM but in that case there should be a check engine light or something. This is the last option we are left with. Will try this! Thank you.
@@savyj6569 Hey sry I didn’t check my notifications. We took the car to a local mechanic shop and he asked us to keep the car at his place for a day so that he can check it properly and let us know what’s wrong with it.. The next day he called and said, there’s something wrong with some sort of sensor in the car. I don’t remember what what he said exactly but all I could figure out was the sensor is not allowing the car to exceed 80kmph. ( Sensor in the left wheel works fine but the one in the right wheel has some issues)
@@savyj6569 I visited this mechanic on 21st December and he said he’ll order a brand new part as a replacement for the worn out part, he hasn’t called back yet and Everytime I ask, has the part arrived he either says no or doesn’t pick up the call.
@@savyj6569 I’m thinking about visiting another mechanic and asking him directly to clean the clogged cat converter. I’m literally fed up of this issue.
I'm having problem with that too. Even I have check engine light on,I diagnosed it(OBD2) and it's said something about cat from under (catalytic converter sensor),not front catalytic close to engine then I ignored it. I don't even know what front catalytic does. I noticed my car jerking while I accelerate like it making me feel that it was low motor oil and I changed it myself. My mpg burned fast than normal. It won't go up to 40 per hrs. I thought it was transmission worn out because of 300k. I went to mechanical(near house). He tested drive it and floor the gas like why it got loud on the hood, he said that my front catalytic is clogged. I started to understand why my OBD2 trying to warn me but it did not say anything about front catalytic . I never knew front catalytic have honeycomb as filter to prevent harm dirty gas in my life. Only under car catalytic pipe I only heard since I took care of my car.
THANK you, having problems getting up to speed and car jerks like crazy, replaced 02 sensor spark plugs snd TPS problem still there, i noticed the exhaust gas was extremely hot as well! and it comes out all sputtering inconsistent and not smooth, aftermarket cat as well, taking it tomorrow to get checked
Backyard mechanic way to tell if it's the CC. Pull the O2 sensor out of your down pipe near the exhaust manifold and if the car goes from running rough to normaling out when you pull that O2 sensor out, you know it's the catalytic converter. A bad CC isn't absorbing emissions and is forcing back pressure back up into the engine. Pulling that O2 sensor allows that pressure to escape out of that O2 port. If you can afford it, take it to a mechanic and they can pull the engine computer data and it'll take them about 5 mins to diagnose it.
Well....in my case: 2000 camry V6. Light on for 420 code all kinds of power. 3 O2 sensors and 3 cats later 2500$. Bc the mechanic could not diagnose it the first time so he ended up replacing everything. Stay away from Toyota especially with California emissions.
@@bryan_trades8867 honestly could be either. I had the same code and changed the upstream sensor, then after changing it and clearing the code. I had a different code pop up for the catalytic inefficiency on the down stream sensor. The CEL reading should tell you which bank it’s coming from, but in your case(v6) I believe you have at least 3 02 sensors if I’m not mistaken.
this was exactly what i needed. i removed my cat and drove like a charm. i was so close giving up because i did everything from new plugs and new coil packs and new valve cover gasket and tube seals and nothing worked. thank you!
@@XxXGBatXxX my car engine is whining like i was towing something heavy, i thought my brake was binding. Now I'm thinking it's the cat, but it's only 4 y/o.
That’s exactly what my Camaro is doing now it’s hardly going 3,000 rpm’s so I’m gunna take my catalytic converter off because it’s bad to honeycombs in it broke all up I need a new one. Thx for your video 👍🏻
Mine is also 21 yrs old haha I was like 4 years old when It was first registered 😂 but I'd rather buy a car cash than take one from the bank... Oh yes mine has 211 000 on the clock. My car is doing this same thing, I thought it was spark plugs because of the low power, but they were fine. Because of the sound I figured to check the exhaust system. And possible CC problem. Thank you for making this video!!!
I change my o2 sensor since that’s the codes that were being thrown. A day later I get on the highway and my truck starts doing the same was this truck, couldn’t go over 45 mph seemed like to wanted to shut off. Exhaust smells different and when I started it this bring back stuff shot out.
Update : this video helped me diagnose and fix my 2013 Acura TL SH-AWD V6 which had no check engine light, and a sudden loss of power above 3500 rpm. One of the catalytic convertors was clogged due to broken catalyst bits stuck in the exhaust mid pipe. Pulled out the pieces and it runs like a top again. Thank you very much 😊
Wow 2013 already have this type of problem. Could be made in China part lol 😂😂😂 glad you found this video thanks for watching and don't forget to help me subscribe 😊
@@alltsab actually it was the original 3rd catalytic convertor ( which luckily isn't monitored so no check engine light from gutting it either! )But the car has 163,000 miles and burns some oil which I think killed it quicker. The acura J37 v6's have oil consumption issues unfortunately.
@@LeoM-zt3ploh I can see that. Even though poor gas also killing the cat. Converter too. from 2010 and above seem like many Japanese made vehicles have consumption oil a lot. Toyota 4 cylinder is terrible.
Bought a Grand Cherokee from a shop who had replaced several parts while "troubleshooting" this problem. Paid $800, drove it home and sawsalled the bad cat and installed straightpipe. Good to go.
Car having hard time going over 2 rpm. I checked plugs, air filter and other basics. Nothing. I removed upstream sensor from catalytic converter. Car went to 4 and 5 rpms no problem. It seems last place to check is where the problem starts. Now I'm going in right direction. Thanks for your video and time.
The very hot exhaust coming out of my truck is what lead me to pulling the catalytic converters off and I did find that the front cat is clogged. Now I need to find a way of cleaning it! Great video. Thanks for sharing.
It could be an air filter clogged too. Not in your case, but the symptoms. I also have had the same symptoms in the past and and the cause turned out to be all of these (not at once): Cat. converter, fuel filter and Mass Air-Flow sensor.
Nice video! I think the cat is my problem with my 4runner too! Replaced the clutch components but the car was still low on power. Hoping for more videos from you!
You can also use a vacuum gage to check for a restricted exhaust system. Attach a vacuum gauge to an intake manifold source. Allow the engine to reach operating temperature. Note the vacuum reading at idle. Raise the revs to approximately 2,000 rpm. The vacuum reading should be close to the idle vacuum reading. Quickly release the throttle. The vacuum reading should momentarily rise, then smoothly return to the normal idle reading. If the reading does not quickly return to the normal level, the exhaust system is likely restricted. To confirm the exhaust system is restricted, you can remove the exhaust pipe from the exhaust manifold.
I wish I would have seen this video two months ago, I did change all those things. Including camshaft, rollers, injector ,were sideways only running on seven cylinders. Blown head gasket. And still truck doesn't run. Mechanic finally told me it's probably the catalytic converter.
Got a problem with my vw transporter t5 1.9 tdi bp cutting out and miss firing cutting out stalling and wont start! 218.000 miles replaced all the injectors and wiring loom! Still the same problem and I suspect the cat! Thanks you for your advice hopefully can puck up a after market cat for a couple of hundred! 😢 been of the road for 2 weeks
Bro you just saved an f150!!!! I thought it was my differential but it does the exact same thing, I'm gonna get that serviced and ill be on my way. THANKS
A very good test for sure right on mr good video I will be checking your channel because it's worth looking at and listening to you explain it good job
My truck is doing the same It runs fine but jerks and goes back to normal after speed is up and feel like it wants to turn off but I replaced spark plugs and coils and fuilds and the scanner won't pick up nothing transmission is good and alternator and battery
I have a Nissan Cube 2005 it’s intermittently stalling it does have the jerk and fall back it sometimes it stalls and restarts but now it’s being towed Hot or cold No matter what Strange the cold light on dash lights befire stalljng yet it ain’t cold
Well said sir, my car got same problem but Machanic changed spark plug, o2 sensor no use then change transmission, NO use ( I spend lots of money) Finally my friend drove the car and told me it’s catalytic converters problem. Don’t go private Machanic’s all r making only money 💰
I love this guy! Thank you I think this is my issue. Fuel+air+spark=running engine. I’ve changed my plugs, coil pack, fuel filter, I’m running injector cleaner, the truck shifts fine. There gotta be two issues… I’m sure more but, it’s either a bad cat, or a bad fuel pump.
Bro perfect description or explanation.. i was also having this problem n some sound (like a metal contact) from silencer too due to this cat issues.. all resolved now. Thx. I paid C$750/- including installation too..
Wow, it explains alot, I was thinking the same changing out everything spark plugs,engine, oil change etc.., thanks to your video , no engine light on and no speed above 40 on freeway, well hopefully I get this fixed soon. And yes I liked and subscribed because it explained alot👍🏼
If this helped what did you do to keep your car running better? Did you simply loosen the catalytic converter like in the video and left it that way????????
My Acura tsx I just bought as a work car has a p0420 code that comes off and on but it’s just as powerful as it should be it seems it picks up and goes once it’s moving but it does seem like at low speeds it takes a second to breathe but it might just be the Long gearing of these Honda automatic’s
sprayed an entire can of CARB CLEANER into a drilled hole just before the CATS with the engine running. Huge boost in performance! Likely cleared blockage.
@@jaygayle2057 i drilled a small hole in the exhaust before the cat cons.... on a straight enough area to seal w a band clamp. then w the engine running I go back and forth between my 2 CATS and spray 5-10 sec bursts. DEFINATELY frees up some blockage!
Hi, I've tried this on my 2007 audi a4. The car drives with alot more power. But just how much did you separate the catalytic converter from the exhaust manifold? I think i separate the bolts too much. The heat burnt underhood insulation and car just died and gives me a bad fuel filter error code. But before the car shuts down i can definitely feel the increase power. Should i tighten the cat bolts alittle more? Excellent video. Thank you.
Work van had the same problem then eventually couldn’t even start. Old mechanic just punctured the inside of the catalytic and van ran normal if not more strong.
Great info thank you for the video, I have a question though, I have a 04 lesabre I have just purchased a month ago and have changed the plugs and wires and also the transmission fluid and filter and im getting ready to do the shift kit on the tranny. I have heard the cat clanking when I would first start it up which I know i need to replace but Im trying to get some more money to get one so in the mean time can I loosen the bolts and let the exhaust leak till I get a new one or would that mess up the car, oh yeah it feels like it has a small missfire and it also feels like its lagging upon first acceleration and shifts a little off sometimes and Im hoping those are just symptoms of the clogged cat and it doesnt clank anymore upon first start up, I drive about 500 miles a week
If you have second car to drive then just park that one until you have money to fix it. If you keep forcing it down the road then yeah it will create more problems.
This is the best explanation I have ever been given for a clogged catalytic converter.
Word!
yes! u kno u got a keeper of a mechanic when he jumps in and floors it
😂😂
Hell ya italian tune 😂 lol
Haha
Why is that?
FORREEEAALLLLL!
This dude reminds me of my old Boss Hogan. I went to work for him right after I got out of college for mechanics. I went in already having been fixing vehicles for friends and myself, didn't learn as much as I hoped (especially after the money) but I learned SOOO much from Hogan so quickly.
Seriously, when I say reminds, I mean basically is. They even look similar. I hope he is doing well, haven't talked to him in many years. Guy took me in like family.
And yes, I replaced all ignition things you mentioned. Then even the intake gasket, all for nothing. I'm quite sure your suggestion is correct for me!
Thanks for the support subscribe buddy 👍
Had 6 codes cleared them all, changed the oil, transmission fluid, spark plugs, air intake, cleaned egr, changed the evap cleaned all the stuck carbon out of the manifold including removing the sensor and cleaning that port out as well. Test drove a million times and still the same issue and no check engine light and I almost lost my mind until I watched this. Even though I havent done it yet, I know this is my problem through your explanation that ive been looking for over 22 web pages. Great job and thank alot for the help. Subscribed!
Wow 👏 you work on everything. Thanks for help me subscribe buddy
What did it end up being
@@MuscleCarMike it actually turned out to be a bad bearing in my transmission so I had to get a new one. But hey, after doing all that work feel like I got a brand new car! 🤷🏾♂️💯
Man I went through the same. This is on my 2005 buick lesabre. Fuel pump, fuel filter, plugs, wires, coils, fuel injectors, egr valve, mass air flow sensor, upstream and downstream o2 sensors, battery, alternator, and lastly the valve cover gasket(just needed it) I'm trying one last thing before I replace the entire exhaust (rockauto $360) and that's the fuel pressure regulator. Before any of that I'm going to loosen the exhaust manifold and just see because of this video. Problem is the random misfire code and flashing check engine light...
@@jefferyedwards8623 did it work !??
Had the same problem on my 03 impala. Was throwing codes that made no sense and even clearing them while backfiring and no power. Super hot out the exhaust with no air coming out. Drove 1000miles and barley made it to my destination. Replaced it and "WOW"
im praying this is the problem on my 03 infiniti g35. im 1.5k deep trying to fix this.
@@kami_dred7319was it the problem after a year?
One of the best and most thorough diagnosis videos I've seen. Keep it up
Thanks buddy 😘
This is exactly what’s happening to my car and having issues going up hills . I thought this was my issue but I wasn’t sure. Thank you!!
Thanks so much. My car has the same exact issue. Two places told me I need a new transmission. But the trans shop I went to today said it's an exhaust issue and you are confirming that. Subscribed !
Thank you for helping subscribe
Was it though? The issue
@@ibggetsemani1206 My catalytic converter was clogged badly. The exhaust couldn't pass through. I replaced it and now it runs fine.
Thats great analysis. I suspect the same in my Camry 2005. It's blowing a lot of air from oil cap, and it sounds like exhaust when I open the oil cap in the valve cover. No smoke, no check engine light, PCV valve and hose are new. There was an exhaust leak just before the cat converter, and I just repaired that leak. I didn't check the oil cap before fixing the exhaust leak, but my guess is that engine is not able to breath from exhaust, and as a result the pressure is building up inside the engine, and releases any where it can. In this case it's the valve cover. I also noticed that in idle if I cover the exhaust tail pipe by hand, the engine does not die or even struggle.
Unfortunately I cannot disconnect my exhaust easily. Someone removed the flange and welded it to the pipe permanently. Thanks for sharing your analysis. Subscribed.
Thank you for the subscribe very appreciated.
This is what's happening to my car, I have a 2003 mazda protege. People say it was my transmission, ot turned out to be the catalytic converter. Thank you for this video👍
You welcome 😘
Same w/ me ,Bet lots of folks get ripped off, lack of info. 👍🙋
Thank you for your time. i replaced a clogged cat 4 years ago and today i just noticed the loss of power symptom im using an aftermarket one and i guess it is clogging again.
After market are cheap quality they don't last
Keep posting videos like this one! Diagnosing problems the on cars can be harder than the actual work sometimes. All your videos should be "How to idenitfy a bad ...." in my opinion or at least have a playlist of the most common problems. Looks like your going to pass 130k on this one and from the looks of it your other videos don't have many views. Stick with what's working and you'll get there. Great job on this one!
Thank you so much with your help very appreciated 😊
YO I am so thankful you made this video I’m driving a 2017 dodge journey with no check engine light on and I’ve change the spark plugs boots and oil change even had my o2 censors be replaced and it still did this and is still doing it now finally I have something to show to the mechanic to give them a better understanding thank you so DAMN much fr fr
These dodge journeys have all types of issues I swear smh
Wow, 2017 is already going south just trash it buy new lol...I'm glad my video help you. Please subscribe to support me ok buddy. 👍
I’m driving a journey 😖 it’s terrible
This is the video that I was looking for. This mechanic is awesome. My 2013 Buick Lacrosse is doing the same exact thing. It runs like a dream until yesterday it started jerking as if my transmission was going bad. My computer reader reveals it was the MAF sensor. I changed it, and the problem still didn't go away. Fortunately, my mechanic was able to disconnect one of the oxygen sensors, and the car started to regain its full performance.
Glad I found this video, bought a 2001 Ford ranger 3.0 v6 a month ago & notice it’s mighty quite & when I try to floor it , does that same as that 4Runner
This is going on with my vehicle I have a 1999 Chrysler LHS just reach 200,000 MI
I know it's my catalytic converter I seen cherry red like fire and I smell and see smoke I have rough idling on takeoff but I did not push it past 50 MPH. My check engine light came on but I also have to replace my alternator. Took my car to O'Reilly's can I scan for a code but it showed nothing. I'm going to start with my catalytic converter 1,000 % sure that is clogged.
Great video easy to understand keep up the good work
@@yuvonnearnold4673 you welcome
My man, thanks a bunch. You've helped me confirm my suspicion with my 3v Mustang GT. No jerking or struggling while accelerating, but definitely, like you said, very little air coming out the exhausts (almost no air at all). I also run a burble/popcorn tune, so, yeh...Plus orange hot cats when climbing around the mountains. Plus bad smell especially on cold start and all the time basically. I've also got an up and down idle but I believe that's because of a bad water pump? Lots of evidence of coolant coming out from below the pump. Haven't done any vacuum leak tests though. Thanks again for the awesome video.
You very welcome buddy help me hit the subscribe ok thanks 😌👍
I have a problem with mine that I'm thinking is cat it almost seems like the timing is off one side must be clogged pretty bad bc I have misfires on one hole side of the engine
Thank you so much! This helped me figure out whats wrong with my car after multiple mechanics couldn't find anything since I have no codes. We need more like you!
It's look very easy isn't it but taking many people to figure out and some people still don't have a clues what's going on. Lol 😆 🤣 now please help me subscribe to my channel ok 👍 thanks
🤣🤣your mechanics can't even figure that out..wow..well find a new mechanic lol
Ive been suspecting my Cat being the issue, this video will help me make a solid diagnosis. just keep doing what you do. don't worry about how many subscribers you have now, the more you put out the more will come. stay consistent and dont quit. the world needs RUclips Professors like you!
Thank you help me subscribe too 👌
That is soooo true
My 2003 Dodge Caravan with 158,000 miles, got P0420 code. Lugs bad on grades. Barely making it up losing speed from 40 to 25 mph by the summit. Runs fine on the level. But runs hotter than usual but not overheating. Replacing cat tomorrow.
Simple concise explanation and this mechanic is hilarious as well. Made for a more interesting video thank you!
Idk if you will still look at the comments on this video, but you just saved me thousands of dollars on a 20 min test, nailed the problem. Subscribed.
Thanks buddy I am very appreciated your help subscribe. Yes I read all comments in my video.
Smart and intelligent young man providing services for others much appreciated
Two 👍 👍!
Thank you very much that you appreciated my work and leave a positive incourage. Help me a number subscribe to my channel ok 👍 thanks again.
Thank you so much for making this video. I have a 99 Jimmy and it is acting just as you described. I have to push it and push it to maintain 100 km on the freeway. Yesterday, initially, I barely made it over a hill close to home. I had it floored and would hardly go over maybe about 20 mph. I was thinking maybe a problem with the injectors but after watching your video I am convinced it is most likely a clogged cat. Maybe debris from the cat has also travelled farther down steam and possibly caused a blockage in the muffler too. I have a scan tool the reads live data so I can also check the O2 sensors and I will purchase a new vacuum gauge also so I can see how the engine is breathing. Like you said that it is like trying to run with your hand over your mouth. ( I had a vacuum gauge but it is missing in action. ) Thank you so much and I am now SUBSCRIBED!!
Thank you for helping me subscribe to my channel
From a cat?
Clogged cat won’t hurt muffler it will hurt the engine . Cus it’s on the other side of the combustion. That’s why you seee the rpm gauges .
laser temp reader. They're like $20 and if the cat is plugged it's hotter upstream (closer to the engine) than it is downstream. When a cat works properly it should be hotter downstream. I dumped sea foam into mine after removing the upstream O2 sensor into the cat and it cleaned it up.
Seafoam states on their website that their product does not clean cats
@@FranciscoJavierOutdoors Its not a product made to clean cats. It worked for me and it's worked for others. Upstream was hotter than down while clogged. Ran the seafoam through and the down started reading hotter, like over 100 degree difference. I was told it might break down the honey comb eventually but had nothing to lose by doing it. If the honey comb breaks down I'll be back to where I was. There are also varying degrees of clogged. Mine was clogged enough to trip a code and show temps of being clogged, but it wasn't clogged bad enough to effect driving (there are two cats).
just the other day i had a 1991 chevy s10 with the 4.3l v6, no fire up condition they brought me a timing set told me to change it.. first thing i checked the timing it was perfect! so i checked for fuel, had fuel. no spark, i told the customer about it. had him take the coil pack to oreillys tested good, so when he came back i had taken the ICM out of the distributor had him test it. and it failed!, put a new one in and she fired right up!! happiest customer i have had in a loooong time!! saved him alot of money!
👏wow
You can test it with a back pressure gauge . There is also a test with a vacuum gauge . If you have a very advanced scan tool , there is a volumetric efficiency test . Otherwise , disconnect it and drive it to test .
Where do you measure the back pressure?
@@gabrielsierra6890 I believe you put the gauge on a MANIFOLD vacuum line . Use the brake booster . Raise the RPM up to about 2000 . Instead of stabilizing to about 17 - 22 lbs. , it is much lower because it is restricted and not breathing . It could be a clogged CAT or exhaust . Make sure the air filter isn't clogged . The engine is an air pump . Air goes in and has to go out . I think there are a few videos on You Tube . A back pressure gauge goes into the front O2 hole . That is measuring the back pressure in the exhaust system . You also can remove the front O2 and find the car improves because you are allowing the back pressure to escape . If dual exhaust , remove both O2's or test one at a time .
This video helped a lot. All we could think about when we faced the same problem was a malfunctioning ECM but in that case there should be a check engine light or something. This is the last option we are left with. Will try this! Thank you.
Same, I just changed ECM and no luck. Thinking this is it. Did you end up changing your cat. converter?
@@savyj6569 Hey sry I didn’t check my notifications. We took the car to a local mechanic shop and he asked us to keep the car at his place for a day so that he can check it properly and let us know what’s wrong with it.. The next day he called and said, there’s something wrong with some sort of sensor in the car. I don’t remember what what he said exactly but all I could figure out was the sensor is not allowing the car to exceed 80kmph. ( Sensor in the left wheel works fine but the one in the right wheel has some issues)
@@savyj6569 I visited this mechanic on 21st December and he said he’ll order a brand new part as a replacement for the worn out part, he hasn’t called back yet and Everytime I ask, has the part arrived he either says no or doesn’t pick up the call.
@@savyj6569 I’m thinking about visiting another mechanic and asking him directly to clean the clogged cat converter. I’m literally fed up of this issue.
I'm having problem with that too. Even I have check engine light on,I diagnosed it(OBD2) and it's said something about cat from under (catalytic converter sensor),not front catalytic close to engine then I ignored it. I don't even know what front catalytic does. I noticed my car jerking while I accelerate like it making me feel that it was low motor oil and I changed it myself. My mpg burned fast than normal. It won't go up to 40 per hrs. I thought it was transmission worn out because of 300k. I went to mechanical(near house). He tested drive it and floor the gas like why it got loud on the hood, he said that my front catalytic is clogged. I started to understand why my OBD2 trying to warn me but it did not say anything about front catalytic . I never knew front catalytic have honeycomb as filter to prevent harm dirty gas in my life. Only under car catalytic pipe I only heard since I took care of my car.
THANK you, having problems getting up to speed and car jerks like crazy, replaced 02 sensor spark plugs snd TPS problem still there, i noticed the exhaust gas was extremely hot as well! and it comes out all sputtering inconsistent and not smooth, aftermarket cat as well, taking it tomorrow to get checked
Yeah you spend money to the wrong direction buddy
Backyard mechanic way to tell if it's the CC. Pull the O2 sensor out of your down pipe near the exhaust manifold and if the car goes from running rough to normaling out when you pull that O2 sensor out, you know it's the catalytic converter.
A bad CC isn't absorbing emissions and is forcing back pressure back up into the engine. Pulling that O2 sensor allows that pressure to escape out of that O2 port. If you can afford it, take it to a mechanic and they can pull the engine computer data and it'll take them about 5 mins to diagnose it.
Well....in my case:
2000 camry V6.
Light on for 420 code all kinds of power.
3 O2 sensors and 3 cats later 2500$.
Bc the mechanic could not diagnose it the first time so he ended up replacing everything.
Stay away from Toyota especially with California emissions.
Explain better because the downstream o2 is not next to the exhaust manifold, that would be the upstream sensor
@@cyberpun2552he means the upstream sensor that is closer to the manifold.
i have a 02 silverado 1500 4.3 v6 with a p0420 code which i think is a clogged cat, which sensor would i have to pull off to test up or downstream?
@@bryan_trades8867 honestly could be either. I had the same code and changed the upstream sensor, then after changing it and clearing the code. I had a different code pop up for the catalytic inefficiency on the down stream sensor. The CEL reading should tell you which bank it’s coming from, but in your case(v6) I believe you have at least 3 02 sensors if I’m not mistaken.
this was exactly what i needed. i removed my cat and drove like a charm. i was so close giving up because i did everything from new plugs and new coil packs and new valve cover gasket and tube seals and nothing worked. thank you!
You welcome now you can help me subscribe thanks
How old is the catalytic?
@@MrKkdkk my car was an 08 so quite old.
@@XxXGBatXxX my car engine is whining like i was towing something heavy, i thought my brake was binding. Now I'm thinking it's the cat, but it's only 4 y/o.
That’s exactly what my Camaro is doing now it’s hardly going 3,000 rpm’s so I’m gunna take my catalytic converter off because it’s bad to honeycombs in it broke all up I need a new one. Thx for your video 👍🏻
I just wanted to address the obvious my problem is fixed my catalytic converter is junk thanks again for the video
You welcome
Mine is also 21 yrs old haha I was like 4 years old when It was first registered 😂 but I'd rather buy a car cash than take one from the bank... Oh yes mine has 211 000 on the clock. My car is doing this same thing, I thought it was spark plugs because of the low power, but they were fine. Because of the sound I figured to check the exhaust system. And possible CC problem. Thank you for making this video!!!
You welcome
I change my o2 sensor since that’s the codes that were being thrown. A day later I get on the highway and my truck starts doing the same was this truck, couldn’t go over 45 mph seemed like to wanted to shut off. Exhaust smells different and when I started it this bring back stuff shot out.
You the man I'm glad there some good mechanics left
Thanks buddy
Update : this video helped me diagnose and fix my 2013 Acura TL SH-AWD V6 which had no check engine light, and a sudden loss of power above 3500 rpm. One of the catalytic convertors was clogged due to broken catalyst bits stuck in the exhaust mid pipe. Pulled out the pieces and it runs like a top again. Thank you very much 😊
Wow 2013 already have this type of problem. Could be made in China part lol 😂😂😂 glad you found this video thanks for watching and don't forget to help me subscribe 😊
@@alltsab actually it was the original 3rd catalytic convertor ( which luckily isn't monitored so no check engine light from gutting it either! )But the car has 163,000 miles and burns some oil which I think killed it quicker. The acura J37 v6's have oil consumption issues unfortunately.
@@LeoM-zt3ploh I can see that. Even though poor gas also killing the cat. Converter too. from 2010 and above seem like many Japanese made vehicles have consumption oil a lot. Toyota 4 cylinder is terrible.
I have a 03 Lincoln towncar that does this now. Thank you so much. I’m going to a muffler shop asap
Bought a Grand Cherokee from a shop who had replaced several parts while "troubleshooting" this problem. Paid $800, drove it home and sawsalled the bad cat and installed straightpipe. Good to go.
Car having hard time going over 2 rpm. I checked plugs, air filter and other basics. Nothing. I removed upstream sensor from catalytic converter. Car went to 4 and 5 rpms no problem. It seems last place to check is where the problem starts. Now I'm going in right direction. Thanks for your video and time.
You welcome
The very hot exhaust coming out of my truck is what lead me to pulling the catalytic converters off and I did find that the front cat is clogged. Now I need to find a way of cleaning it! Great video. Thanks for sharing.
Can't clean it brother have to be new only. Unless your state doesn't require smog inspection.
It could be an air filter clogged too. Not in your case, but the symptoms. I also have had the same symptoms in the past and and the cause turned out to be all of these (not at once): Cat. converter, fuel filter and Mass Air-Flow sensor.
You’re the man! You helped me so much with this video!
You welcome buddy don't forget to help subscribe
Nice video! I think the cat is my problem with my 4runner too! Replaced the clutch components but the car was still low on power. Hoping for more videos from you!
Yup
Getting it fixed tomorrow and wow exactly what I needed to see
Same here
Same
How much did it cost?
“When/after u change it, it should RUN LIKE A CHAMP”. 🤣
Definitely a new subbie here.❤️
My 1995 mustang v6 has 63k miles on it and it’s pristine
Thank you sir! this video help me my truck was doing the same thing I replaced the cam sensor the crankshaft solenoid coil packs plugs ....
You welcome buddy help me subscribe ok
I was about 99 percent sure my cat was bad now I'm positive thank you!
This is the best diagnosis I ever saw. Must floor all way 🤙
EXCELLENT VIDEO. Thank you. Indeed, it's not gonna be cheap...but it will be fixed.
Thanks buddy
You can also use a vacuum gage to check for a restricted exhaust system. Attach a vacuum gauge to an intake manifold source. Allow the engine to reach operating temperature. Note the vacuum reading at idle. Raise the revs to approximately 2,000 rpm. The vacuum reading should be close to the idle vacuum reading. Quickly release the throttle. The vacuum reading should momentarily rise, then smoothly return to the normal idle reading. If the reading does not quickly return to the normal level, the exhaust system is likely restricted. To confirm the exhaust system is restricted, you can remove the exhaust pipe from the exhaust manifold.
Thanks got the same problem cat is on the way out just ordered a new one
Most definitely was helpful!! Now I know exactly what’s the problem on my vehicle!! Thanks man!!
You welcome
Thank u im dealing w a clogged cat on a 3.8l v6 buick 05 lacrosse w 240,000 miles runs great but can deffinetly feel the clogged cat effect
I wish I would have seen this video two months ago, I did change all those things. Including camshaft, rollers, injector ,were sideways only running on seven cylinders. Blown head gasket. And still truck doesn't run. Mechanic finally told me it's probably the catalytic converter.
You spent ton of money isn't it
Got a problem with my vw transporter t5 1.9 tdi bp cutting out and miss firing cutting out stalling and wont start! 218.000 miles replaced all the injectors and wiring loom! Still the same problem and I suspect the cat! Thanks you for your advice hopefully can puck up a after market cat for a couple of hundred! 😢 been of the road for 2 weeks
My car needs a Cadillac converter and after watching your videos now I kno a lot cause you answer my Question Thank you
No one wouldn't explain why my car was doing wat it was doing like hesitating when it make a right turn
what kind of car?
Catalytic converter
That's my problem. I got the lincoln converter 🤦🏻♂️
Dude my truck is doing the same thing. I have replaced the ignition coild and spark plugs still the same thank you bud
You welcome
I have a 99 crv that hates going uphills and its making me want to get rid of it. But im gonna try this myself and see!
For 20 years old that car is beautiful
Not a huge fan of pets but i definitely need a cat.
Thanks mate spot on.
Lol 😆 🤣 😂
Thank you.. I think that this is what is wrong with my car.. new spark plugs and new coil and it still doesn't want to go over 40 mph
Bro you just saved an f150!!!! I thought it was my differential but it does the exact same thing, I'm gonna get that serviced and ill be on my way. THANKS
Nice
Hi would a catalytic make a car jerk now and then while driving ? Feels like a fish bite
A very good test for sure right on mr good video I will be checking your channel because it's worth looking at and listening to you explain it good job
Thank you
My truck is doing the same
It runs fine but jerks and goes back to normal after speed is up and feel like it wants to turn off but I replaced spark plugs and coils and fuilds and the scanner won't pick up nothing transmission is good and alternator and battery
Same problem with car, good video Bro
Great diagnosis
I have a Nissan Cube 2005 it’s intermittently stalling it does have the jerk and fall back it sometimes it stalls and restarts but now it’s being towed
Hot or cold
No matter what
Strange the cold light on dash lights befire stalljng yet it ain’t cold
Well said sir, my car got same problem but Machanic changed spark plug, o2 sensor no use then change transmission, NO use ( I spend lots of money)
Finally my friend drove the car and told me it’s catalytic converters problem.
Don’t go private Machanic’s all r making only money 💰
Some mechanics only know how to take money from you they don't know cars problem. 😆 🤣 😆 please help me subscribe ok thanks
This is exactly what my Honda is doing. Going to check the cat. Thank you!
You welcome
Your 3 year old video is the best result of all the Google search results
Thanks got mine fixed that was the problem
thank you! you just helped me prove to a customer about a clogged exhaust.
You welcome
I love this guy! Thank you I think this is my issue. Fuel+air+spark=running engine. I’ve changed my plugs, coil pack, fuel filter, I’m running injector cleaner, the truck shifts fine. There gotta be two issues… I’m sure more but, it’s either a bad cat, or a bad fuel pump.
Thank you 😊 help me subscribe ok 👍
Subbed! Sorry!
@@fullsendsurvival7804 thanks buddy
If you hear a hum when you turn the key on then your fuel pump is working fine
Bro perfect description or explanation.. i was also having this problem n some sound (like a metal contact) from silencer too due to this cat issues.. all resolved now. Thx. I paid C$750/- including installation too..
That is great 👍 please help me subscribe to my channel ok thanks
My 96 4Runner is still running like a swiss watch. Roled over 333,333 miles the other day.
Having the same problem with my Xterra. I want to know who the hell decided to put FOUR catalytic converters on a damn Xterra. 🤬
Had 4 on my 95 mustang as well.
Bro. I see your effort & hope you do prosper, you sound so genuine , but hard to understand, any way thanks for the info. 🙋👍☮️
2x speed playback - for the win! good info
very practical piece of information . thanks so much
@@PiyalPushpakumara-y2u you welcome
Wow, it explains alot, I was thinking the same changing out everything spark plugs,engine, oil change etc.., thanks to your video , no engine light on and no speed above 40 on freeway, well hopefully I get this fixed soon. And yes I liked and subscribed because it explained alot👍🏼
Thank you for helping my channel grow very appreciated.
God bless you brother !
Thank you you too.
Great video! I just got my 1999 4runner out the shop and they said it was the a clogged CAT. Definitely subscribing
Thank you so much
This Fixed My Misfires .! 🔥🔥
If this helped what did you do to keep your car running better? Did you simply loosen the catalytic converter like in the video and left it that way????????
Very, very, very useful video. Thank you!
Thank you
I think this may be the problem of my vios..i have into different mechanics but the problem of power loss remains. Thanks a lot brother.
You welcome brother
Thanks for supporting me. I am appreciated very much.
This could be the same issue i am facing with my car too...thank you. Subscribed.
@CT-vl3iu thank you for your support subscribe very appreciated
My Acura tsx I just bought as a work car has a p0420 code that comes off and on but it’s just as powerful as it should be it seems it picks up and goes once it’s moving but it does seem like at low speeds it takes a second to breathe but it might just be the Long gearing of these Honda automatic’s
sprayed an entire can of CARB CLEANER into a drilled hole just before the CATS with the engine running. Huge boost in performance! Likely cleared blockage.
Where do u spray the cab cleaner
@@jaygayle2057 i drilled a small hole in the exhaust before the cat cons.... on a straight enough area to seal w a band clamp. then w the engine running I go back and forth between my 2 CATS and spray 5-10 sec bursts. DEFINATELY frees up some blockage!
Awesome thank you for this video, that is exactly what my 2001 Chevy Camaro is doing, it hardly runs now
You welcome
Same thing with my “transmission “ problem.... (cat) he charged me a new tranny and then went on to still be a problem smh it was the cat
😅 May The Lord Jesus continue to bless you Sir . Thanks for video explanation .
Thank you very appreciated for your blessing
@@alltsab I have a 2005 ford taurus po430 but engine code is 📴 should I use any liquid fluid catalytic converter cleaner like seafoam or cataclean ?
@timham6464 no cleaning doesn't work buy new one only
Hi, I've tried this on my 2007 audi a4. The car drives with alot more power. But just how much did you separate the catalytic converter from the exhaust manifold? I think i separate the bolts too much. The heat burnt underhood insulation and car just died and gives me a bad fuel filter error code. But before the car shuts down i can definitely feel the increase power. Should i tighten the cat bolts alittle more? Excellent video. Thank you.
Do as need it. Used your judgment to adjust it.
Work van had the same problem then eventually couldn’t even start. Old mechanic just punctured the inside of the catalytic and van ran normal if not more strong.
Nice 👍
You just saved my life💯 thank you!!
You welcome buddy please help me subscribe okay thanks
Great info thank you for the video, I have a question though, I have a 04 lesabre I have just purchased a month ago and have changed the plugs and wires and also the transmission fluid and filter and im getting ready to do the shift kit on the tranny. I have heard the cat clanking when I would first start it up which I know i need to replace but Im trying to get some more money to get one so in the mean time can I loosen the bolts and let the exhaust leak till I get a new one or would that mess up the car, oh yeah it feels like it has a small missfire and it also feels like its lagging upon first acceleration and shifts a little off sometimes and Im hoping those are just symptoms of the clogged cat and it doesnt clank anymore upon first start up, I drive about 500 miles a week
If you have second car to drive then just park that one until you have money to fix it. If you keep forcing it down the road then yeah it will create more problems.
Thanks Pal for the education. I think you solved my problem!!
01 Ford Windstar.
Well done
THIS IS EXACTLY MY PROBLEM!!!!! 😮 I heading to change mine and will let you know!
Thanks