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Ford F-150 5.4L 3v Low Power Concern: P0430 P0305 P0171 P0174
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- Опубликовано: 14 авг 2024
- Come along as we diagnose a low power concern on a 2004 F-150.
Walker and Magnaflow offer direct fit replacement Catalytic
Converters for a fraction of the cost over OEM-
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The information, demonstration and any content contained in this video is for informational purposes only. The user and BSG Automotive (hereinafter “FordTechMakuloco”) makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. FordTechMakuloco shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by FordTechMakuloco and therefore, FordTechMakuloco does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge FordTechMakuloco or anyone affiliated with FordTechMakuloco, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.
Walker and Magnaflow offer direct fit replacement Catalytic
Converters for a fraction of the cost over OEM-
Walker-
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Magnaflow-
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FordTechMakuloco CARB legal?
Great point Geek. You can buy cheap parts all day. Do they work properly, do they work within the parameters that is called for?
+GeekDIYMechanic Magnaflow offer CARB approved options in most instances.
+Richard Ostrowski Magnaflow is definitely the premium aftermarket option here. In most situations they offer an OE grade cat option with longer warranties.
FordTechMakoLoco what method do you recommend for removing the cat assemblies from the manifolds without breaking the manifold studs?
If could meet this guy I'd have him sign my dash
Same
I would buy the dash
😂😂
A good idea is to take your scan tool and connect it to all your vehicles when they are running perfectly and then record all the normal waveforms and values and then save them. Then if you have a problem down the road you can compare the current abnormal waveforms and readings with the normal ones from before. This will often make a problem obvious during troubleshooting. I have a full set of normal readings and graphs recorded for all my vehicles to compare with if a problem ever comes up.
That's a great idea. I was thinking the exact same thing. Just have to have good readings first. Not there yet.
Dude my guy, this is been a issue for me for 3 years!! Changed every sensor, timing redone, exhaust system redone new intake.... I have the same readings as your video. Bank 2 for sure has a clogged catalytic converter. THANK YOU!
Just had my cats replaced on my 2009 F250 5.4 3v. #5 exhaust roller follower was seized and replaced. The engine started to tick. The reason it went in in the first place after seeing your vids on the 5.4. Fortunately caught it early and no damage was done to the engine. You saved another 5.4 out in the field with your advice. Mine! Thanks Brian.
OMG I had this exact same problem. The Garage took me for a fool and changed all my plugs, coils. It still hurts to sit down.
Been building cars for 20 years. And I don't touch my F150 until I consult Ford TechMakuloco
You're the best tech I've seen on tube.fords finest tech
Turning wrenches is the easy part of working on vehicles diagnostics is the hard part. And you’re a beast at it. Thanks for the videos. 💯💪
Good video, I like that you showed the before and after readings and explained everything in detail as you were diagnosing the problem. Then interpreted the readings so we could understand what was happening and what good o2's should read.
Another awesome video. I'm a ford technician and I've been watching your videos for a couple years now. Keep it up they are so helpful!!!
I know that this video is kinda old at the time I am writing this but I thought that this was worth commenting. I have the exact same year and model as the F-150 in this video with the same engine and the same problems. This video helped me to diagnose the issues that my truck was having. You did an excellent job teaching why this happens and the rest of your videos are amazing as well. Keep up the great work @FordTechMakuloco!
Wow this was a “tailor made” video that I have with my F150 truck. Mode 6 was detecting mis fires #5 and yes a destroyed cat just like this video. Hope the new cat will play out the same.
Thanks for the help . I just passed my California smog check after replacing the cats on both sides and the muffler as well as addressing a head gasket leak .Not only did it pass but the numbers were a fraction of the allowable limits on all three types of emissions !
I have a 2005 5.4 Triton. Certain I have this issue. 187k miles. Debating new Engine from Dealership, ( my cousin is the GM, I get a good price) or just replacing everything i.e. Phasers, oil pump, tensioners, chains, rockers and lifters . Those are the only parts i have Not changed out yet. It ticks, idles poorly until warmed up for 15 minutes, throws a 0307. Love the truck, wish I had the 5.0 Thank you for your help. I have been able to enjoy working on my truck with your expert advice. Thank you for telling me about the Amazon deals too! I never would have known.
That's crazy. At 71,000 miles. I have the exact same 5.4 3V engine at 348,000 miles, and it runs like a top. Only ever changed the starter, and both VCT solenoids because that seemed like the flavor of the day, so I did it. Yesterday I replaced all SP515 spark plugs to the new SP 546, and I cleaned the throttle body completely. Runs like my wife's Ford 2.7 Ecoboost. I'd put a straight pipe in place of the catalytic converter and be done with it.
I believe the reason #5 misfires is because it fires right after #6, the rest of the cylinders on bank 2 fire after bank 1 giving time for the pressure to drop in #2 manifold.
The best method I've found for finding/confirming a clogged cat is temperature. The outlet on a working cat should be hotter than the inlet, if it's clogged it'll be colder. A quick scan with an IR gun will tell the story.
You are the best. I am having very similar issues with an 05 Taurus OHV. Plus i get random misfires. Sure thinking CAT now.
I am mechanic in puerto vallarta mexico thanks for another great video my frend pid baro is a god diagnostic.
Cool diag, Brian! I enjoyed the whiteboard explanation segment. The scanner can definitely tell you a lot right from the driver's seat. Personally I still like to back up the scan data with a backpressure reading at the upstream O2 locations. Only takes a minute...if the O2 sensors don't fight you that is lol
That is the problem many times on these engines they gall up in there and you end up pulling the threads out with them. I have never found this diagnostic method to fail me but I do have a manual gauge just in case things don't add up.
I just update the exhauspipes with testing ports that you can plug and unplug when needed.
That way your ECM/PCM can still use o2s and you can be sure you dont brake them in testing backpresures.
Allso dont forget that muflers can allso be pluged...
If you heat them with a torch you won't pull threads
Great detailed instructions. I have a 1998 Ford F-150 . Was doing the same thing. With my travels I do go through different sea levels. Problem was my trucks catalytic converter. Great information. Thanks.
Glad I subscribed! I have changed MAF sensor, PCV Line and Front O2 Sensors! Truth be told I think I want to replace the entire exhaust.
Exact problem with my 2006 King Ranch . No power, no acceleration, misfire on Cyl 5, and even rough idle. I can hear the rattling in the Cat while driving. Thank you for a well communicated video
sir, your scanner is at the top of the line, and you as well; keep up the good work.
My 2010 F150 5.4, melted its cats on the way back from Florida, a couple years after I bought it, it was still under warranty. I could hear the difference.
Did you all of a sudden lose power ...and did you have any miss fires ?
Did gas mileage drop
Dude, I swear you're a wizard under a hood. I wish you were a cousin of mine so I could get you to work on my truck for free. LOL
pfcjking1 not for free, obviously give them at least something back
Doyle would whip the tar outta me... mmm hmmm.
HAHA
FREE? nothing in life is free, quit being so self entitled.
@@tttarms1970 if you only knew how much "horse trading" goes on with my family. It's not free, by no means, but no money gets exchanged. If you're an electrician, you'll get a call when it's time to pay up for that "free" help.
Been a fan going on 3 years now. I had a misfire on the number 5 and Change the plug, coil and still had an issue at that cylinder. So I get on the freeway and couldn't get over 40 miles an hour going up hill. It did increase going down here. I kept an eye on the RPM and it had me thinking something was wrong with the trans. I had never had problem with it. I got a new engine put in and had them service the trans. So since I did a crappy job, and lied about the service they was going to give me on the engine, I was thinking another thing they beat me out of my money on. So I start watching your video one after another. They shop said it was my intake. I was like it runs and sounds great at low speed. So I did not listen to him. So when I first got the truck 6 years ago. I used to get cat lights on it. But when I drive from Minnesota to Mississippi that check engine light never comes on. But this time it end up being the cat. Another shop told me that changing the cat will not solve my problem. I made a bet with him. He didn't go for it. I am happy to say that my baby running excellent right now with the CAT change Thanks to you sir. You are the best sir. My baby got up to 115 yesterday. Now to get rid of this and never buy another Ford unless it have a 351 in it. Never every had a problem with my Bronco. Should have kept it. Traded it in for this truck.
Omg thank you! I was abt to start to replacing spark plugs. Wires. Egr. Etc. never woulda thought abt converter. Def the problem. Barely any exhaust coming out of pipe.
good video brian..can always take non contact thermometer and check temps in and out of the converter.. even those cheap $20 harbor freight ones work decent.
What should temps read?
I have an 2006 Expedition, EB package, 127k miles. Been having some issues lately and this explanation has helped me understand more. Two weeks ago Autozone read a code that Bank 1 sensor 1 was rich, replaced sensor drove interstate and ran good. Parked for 1 1/2 days and CEL came on again, This time it was reading bank 1 sensor 1 rich and bank 2 sensor 1 lean. I will be looking at it tonight with a mechanic friend. I'm also thinking vacuum lines or MAF. The last two winters have been cold and a field mouse has built nest behind MAF a few times. One vacuum line replaced last year. Another appears to be dry rotting, Replacing vacuum line tonight.
Very nice video, simple but very instructive. Learned a lot from it. Keep up the good work.
You are the ford man.
You would think they would make it toss a code when the converter flow stops?
Great video and love the expanded explanation of what is going on. What would happen (hypothetically) if you installed a straight pipe to replace the bad Cat and didn't use the downstream O2 sensor?
My old man bought a brand new lariat 5.4 super crew f150 in 2001. I'm telling you that truck had more problems than the HR department at ISIS. blew a couple spark plugs into the hood in the highway once, and since the day he bought it, the truck was simply gutless. Too much truck in an f150 for that motor in my opinion. It had the clicking sound all 5.4's are famous for. The trucks fit and finish was great, but the power train was simply not enough.
Thanks for the video you saved me money and headaches.
I got a new magnoflow setup Cal all the way front to back new o2 sensors aall at 290K orig motor, never been cracked open.
I’ve got a 04 f150 3v that 3 Ford dealers couldn’t figure out. It runs great , no misses but will not rev . Every so often when taking off it will get the burst of power you expect back goes right away. One Ford dealer said it wasn’t advancing timing. Not sure if it’s timing or vct. My truck looks new and has low miles 137.000 but is mostly worthless. I wish I was close to you. My other 3 V engines are awesome cam phaser lock outs and a sct tune.
Bro I have the same problem lost power but I have no codes even I put cold intake for more air and no improvement I check the catalytic and seems in good condition a mechanic checked and say that everything is working good I haven't find a good master like you. I will keep watching your videos to figure out what is the problem
I was waiting long time for this video! Sorted all b4 anyways. Thanks a lot Bryan. Keep the good work and these great videos!!!
I have an 07 5.4 and I know there's problems even though I've had the mechanic scan tool. There's no codes showing but I get the sulfur smell and no power. I know one of these cats got to be plugged up but nobody figured out which one yet. 8 miles to the gallon. Signed fix or repair daily
I need a mechanic like you all the mechanics i have experienced are sketchy and have minimal diagnostic skills
They don't make money by doing logical diagnostics. They make money by replacing parts and charging you until they guess right.
isnt it true,hard to find anybody anymore that can actually troubleshoot anything,their answer is just replace the whole thing,went to a tranny shop the other day,all i wanted was them to put a clutch pack in a carrier case,already had it out,just couldnt find a tool to take the spider gears out,had everything i needed to complete it,they weren't interested,not enough money in it,their answer was get a new carrier,ring and pinion and they would put it in for me for $700,really,and forget about the old days when the guys at the parts store actually had worked or still did as mechanics and knew what you were talking about,now its some kid or a retired walmart worker that just punches keys,wtf,like talking to a zombie
I found out this was my problem wish I had seen this before I did all the other things was about to replace my engine found out yesterday catalytic converter was clogged.
What symptoms did you have
I did a 2006 with a cylinder 5 misfire today and 02 sensor looked the same baro was at 146 and no cat codes the shop replaced coil and plug and then called me I did back pressure test and verified it now that I watched this video I'm sure off it now brain is very good I watch him scanner saner and Eric thanks brain
Nice fix Brian. Gotta admit though, I'm not exactly clear on why the clogged cat affected the baro value. You probably explained it well enough, I'll just have to watch again. Thanks!
+Baxrok2 the whiteboard part is where I explain what is happening.
It has to do with the amount of flow thru the engine. If the exhaust is restricted due to the cat being plugged, it affects the ability of the engine to move intake air. The maf constantly monitors this and uses the data to extrapolate fuel mixtures. If it can't breathe right, it won't run right. It is akin to being in a high altitude area with thinner air, like driving in the mountains with a naturally aspirated( non turbo or supercharged) engine. More throttle input required to get any power.
Great video and very informative. I've watched all your videos on the subject because I currently have the old P0430 on my 2011 EcoBoost. I have a new driver side cat coming in, so I was curious, what is the swap out procedure? Would you consider making a video showing your method? I'm sure it would help a lot of folks out.
Excellent video and phenomenal diagnostic skills! My question however is wouldn’t the 02 sensor detect the plugged cat and throw a “Catalytic efficiency below threshold” type of thing????
+Bill Williamson not until it totally fails and the rear matches the front all the time
Interesting! I'm getting the P0430 code being thrown, of which I've deleted, so no more 'check engine light' but when I scan it again, it's still showing the same code (just no check engine light). My fuel mileage hasn't been a concern, and my power is still great, thus I'm thinking it may be the sensor being faulty. I've not tried the 'tapping the bottom of the cat', so will try that when the rains stop, but as mentioned the truck still has great power and runs smoothly as it always has!
Very good info. It backs up my techs diagnosis. I have a 2008 f250. Bought used from private owner. One concern of mine is why would my gas gauge fluctuate? From a full tank in drops to half in less than 50 miles. Then fills up on 9 gallons. It’s a 30 gallon tank. Do I need a new fuel pump also?
Do I replace both catalytic converters even tho one is the problem?
Reminds me of the vid you put out 2 years ago Jun 4th 2015, Same kind of issue. Cat was plugged up on that '07 Expedition 5.4L
Yeah that was the first stop on the summer tour.
Wow timing problems at under 80k......glad it waited till 150k for me.........thanks again Brian!
I’m about to look into that on my 04 f150. Very useful information. Thank you.
Man I enjoyed it, learned a couple things I still didn't know.
Have one in the shop now and it's been a headache. Thanks for the vid!
Thanks for another great video my friend. I learned so much from this video. I am not a mechanic but I am so interested in this stuff.
I have concern throwing many codes I've replaced both vvt's all plugs all cop'S 5&7 sometimes 8 miss fire I let sit over night Start runs like new after 20 minutes or so runs rough idles irrationally really bad have to pull over and cool for 30to40 minutes then start up is fine then fires up fine than repeat please help? I'm thinking bad cat possible am I right? also think phasers are bad im new to 5.4l 3V Triton to add LOVE YER VIDEOS thankS a million retired VT active duty Army vet 2004 FX4
Sometimes I think what Doesn't this guy know. Always amazing and well detailed videos. : ) Was this also common for the 4.6V8 2v?
Could a dirty MAF cause low BARO readings too? It could also give you lean codes without throwing a MAF code. The tell tale sign in this case was the long term fuel trims showing lean on both banks but worse on one than the other, pointing only towards a plugged converter. Not much else it could be on this design. Thanks for video.
Yes very well done . Thanks I have an 2004 lincoln Town car 4.6 it has a tremble in drive with foot on the brake, other then that runs and feels great. new tue up etc. dirty intake ?? Thanks agian
Excellent video, great job explaining how the scanner results led you to your diagnosis!
2006 Ford f150 5.4 2wd here. Would the beginning stages of this cause a rough idle???? No codes. All spark plugs and coils new. New vct solenoids. Thank you
My baro reading is 149Hz but it seems to be stuck at that number even if I clear codes key on engine off.. Bank two is super lean according to my fuel trim readings. All cylinders miss firing. I haven’t smoked test the intake because I’m at home doing the side job. I’m suspecting a plugged catalytic converter
Just bought my first Ford truck and it's having a problem with power going uphill at 60 miles an hour it runs fine around town but it has an issue with power loss on any long drive.
2004 f150 3v 5.4
@fordtechmakuloco maybe #5 misfires because #6 fires immediately before and the exhaust pressure from number 6 hasn't finished evacuating and begins filling #5 and diluting the intake as it comes back around? Every other cylinder gets a break before the next ignition event. If this is true the same could happen to #3 if bank 1 is clogged...
the best info for ford vehicles
Also could use a IR temperature sensor measuring before and after each exhaust pipe connection.
That is another method to check if the chemical reaction is taking place yes but I have found that to be unreliable and would only use it to back up my scan tool findings.
The best way to evaluate cat efficiency is to look at the upstream and downstream waveforms and compare them. The upstream one should be varying and the downstream one should be relatively flat. Comparing the two waveforms is essentially how the PCM continuously tests the cats and decides whether to generate a trouble code and turn on the check engine light.
I just ordered some hi-flow (200 cell) cats for my 08 F150, but the new cats do not have the O2 bung in them. Should I just install bungs just behind the cat in the regular 2.5" piping for the O2 sensors?
I have a scanner just not familiar with the graph data I don't know what numbers should be
Wow man I have a 1981 5.0 motor in a 1981 F-150 Pick up truck and the exhaust is overheating the starter I bet it has the same problem the cat is probably plugged up thanks man I’m going to check that out.
For a plugged catalytic converter, its quicker to diagnose by comparing each bank with an i.r. gun or thermal imaging gun
Nope especially if both banks have failed, not to mention possible fueling concerns bank to bank with failed components. A test drive with the proper data feed is the way to do this.
My 11 ecoboost f150 popped the 430. Dealer is replacing the bank 2 cat and re flashing the pcm. They gave no reason for the cat to fail, so in your best opinion, what causes the cats to fail and what can be done to remedy it so it does not happen for awhile?
I have a 1999 f150 4.6engine idol drops to almost a stall then comes back to normal, this starts when it runs about 5 minutes, the rpms continue to go up and down.ANY HELP WOULD BE GREAT.
Of topic question, I have a 05 5.4 and my battery light came on with a p0622. So I installed a bigger battery and a 130 amp alternator. All the grounds are good but it is running at 12.8 at idle. What else should I look for?
I'm having a 02 sensor code, changed all 4 plus I flushed Antifreeze and replaced temp sensor. 2006 f250 5.4 a plug cat for sure
I really like your videos! I have a 4.6v and a 5.4 v, run 5w30 ,
I've got a 2006 Ford Expedition Eddie Bauer with the 3v 5.4 Triton motor. I've replaced the plugs twice, the cam phasers, the oil pump, the coil packs in the 5 years I've had it. Recently I've began experiencing low power having to floor it and get it over 3500rpm to get it to get up to speed on an on ramp or to pass a slow moving vehicle. I ran the crap out of it for about 15 minutes using over a 1/4 tank of gas and stopped looked underneath and both cats were glowing orange, and when you run it with the windows down you can hear pre detonation and what sounds like a bad exhaust leak. I parked it and just waiting on some time to pull the manifolds and y pipe and weld in some test pipes in place of the cats to eliminate the problem. Can I disable the post cat 02's so the CEL doesn't stay on all the time? This is the first Ford I've done extensive work on, I've done 5 LSx style motors, and back in the early 2000's installing headers and eliminating the downstream O2 using HP tuners.
2003 ford Taurus 3.0 miss fire on 4 5 6 , plugs are good, fuel rail good, coil pack good, was told possible cat clog or cam timing..... what's your take on this. Thanks
Does the check engine light always come on if you have a plugged catalytic converter
Great video! What diagnostic tool are you using?
What are some common transmisson issues with 99 f150 with the 4.6 triton
Brian my compliments to you on very well put together presentations with a wealth of information for us f150 drivers in particular.
I seen @ video you did a while back on resetting the pcm by disconnecting the negative & then using mini jump cable to drain the capacitors ??..I'd that a procedure you still recommend doing if my truck is showing shift issues??..It'd a 2008 f150 5.4..Thank you.
I just installed a OBX header and cat system in to my 2006 Ford F-150 5.4 and getting a po420 and po430 can you point out what would cause this?
Looks good to me. Mine is a 95 ODB1 4.9 inline six with 1(one) o2 sensor so I can't get multiple readings...
You saved my f150 without you I would have sold it a long time ago
Did that clear up the other codes? Does running cheap discount gas (non top tier gas) clog the cat in time? This ethanol gas is crap! Thanks for the vid!
Hey man, I have a random and unusual beep comiing from behind the dash. I don't have any warning lights. No idea why I'm getting the beep. There is no pattern to it happening, just random.
Great info. I watched a video of a DIY You Tube Mechanic who thinks his stuff doesn't stink & he gave conflicting info than yours. I hate seeing guys like this get far more views than the pros like Brian, Eric O., Ivan & all the other great techs. I guess some people rather get info from an armature that's in love with himself rather than an experienced pro.
I just had a serious problem with 06 5.4 serious engine miss and rotten egg smell had it towed too the ford dealership and was told all 8 spark plugs amd boots were bad and #8 fuel injector was bad had them replaced them went too get my truck back while driving it hame the check engine light pops back on drove it back to see what was the problem and the left bank catalytic was out and it was no longer available from ford the dealer sent it to a muffler shop they use and had it replaced and I had them replaced all 4 02 sensors all together over $3.600 for the fix .
hey I have 2011 ford mustang it has a engine knock but not at idl it's starts when you accelerate or rev the engine. i think it's possibly the timing phaseres. What's your thoughts on it
wanted to know what advise you could give me on how to fix a issue going on with my 2004 F150 5.4L I believe it is the catalytic converter. i have done new (timing chains/ cam phasers /fuel pump/ spark plugs/coils. i don't know what else it could be i just have a lot of lost power & it feels like transmission problem but i know that's one of the symptoms that the cat might throw.
I have a 2009 5.4 3V F150 with 90,000 miles. I have just no power at low rpms when going up hills and any other high demand acceleration. I replaced all plugs, coils, and even changed the MAF with a new one. Started doing this only a month or so ago. Not throwing any codes. Seems to be a little more pull once I actually let off the gas when the RPMS are high. Ive also used your technique to reset the computer by unplugging the battery and connecting the negative cable to positive battery terminal. Really need some help! Thanks
I have 05 f150 FX4 with 149k and keep getting a p0430 and finally decided to change the cat. Checked O2s for both banks and front switching like they should and the rear drop down to .019 volts and it's doing it both sides? The bank 2 is new cat and both new 02s shouldnt the one in cat never drop below .400 right? Now getting a wierd idle and seems to run ruff for bit and after warms it smooths out and sometimes it almost die on me putting it in gear. So I cleaned the maf sensor witch was really dirty and throttle body. Check the volts with the maf sensor at idle and it's at .076 and the bank one got negative long and short terms witch it's over -22 combine but won't throw check engine lights. The baro won't got to normal its staying at 147 to 148.5 and think my area needs to be 151
I am too from the Chicagoland area .I would like to be in touch with you. I just aquire a 01 for F-150 5.4 Triton. Having a miss fire on p0302 an p0304 and a starter grids some times when trying to start. .be awesome to get some feedback. Thanks
Use a long masonry bit...
I have the exact same truck. I changed my cats on both banks and its still doing the hesitation and miss only at w o t. They are brand new cats put on. No check eng light codes.
You need to fix this pronto before you burn up the new cats. Be sure to check the coil pack. On many Fords they crack underneath and will cause misfires under load. Of course it could also be the wires and/or plugs.
i have a king ranch 2007 and have the same issue, missfire under load on bank 1, check te cats and they are clogged and broken.
Put magnaflow cats oem specs and problem solved!
You mentioned you are in Chicago, where about in Chicagiland?
I would love for you to work on my truck. No one else can figure out the issues with it. Very similar to what's going on with the truck in this video.
Thanks!
Thanks for sharing your skills, of course that it'll help me next time in my work to make a good diagnostic on the cat converters you got my like keep the same way posting good videos and im a new happy subscribers
I’m only getting a PO305 code, changed spark plug and ignition coil, no luck. My truck is weak and struggles to get up to 70-75. Today I check and my cat hotter than my muffler. Can my cat be clogged and not throw any other codes?? Needing help thanks
I have a 5.4l 3v that barely wants to run at all and keeps throwing 02 codes n once you get it running it runs rough almost like it's so restricted that it just cant...would that be the converters are plugged?
About how much would this cost to have repaired at a local dealer? I'm experiencing very similar problems with my 5.4L 3valve.