My Diagnosis on This One Was Wrong

‪@WrenchingWithKenny‬ ‪@SNAFU.performance‬ ‪@traditionovertrend2704‬

[@oxygen454]

It's snowing here in western Canada 😂 no pollen here

[@charlesb4267]

Thats exactly what I thought, real world problems down there while we freeze our butts off in the frozen arctic !

[@82_KID]

It's a tie between you and @South Main Auto for best auto channel. And Eric at SMA likes my cat! (Snowball. Says he has me trained well LOL.) Keep doing what you are doing! Maybe I can talk him into flushing the coolant on my Mom's Taurus lol.

[@GNX157]

Eric might have put the smoke machine in this one.

[@82_KID]

@@GNX157 I presently operate an engine that ingested a straw from PB Blaster... sometimes I worry about my "valve." Every once in awhile. When I feel it not idle smooth. But I really like watching the real time misfire counters on this one. I love that I now know some of the symptoms of a possible bad valve issues. I thought valves could be replaced if you take a head off?

[@GNX157]

@@82_KID yes they can be, however going by what Kenny is saying, there is a known design or manufacturing problem with the head or engine, so best to let a dealer handle it if still under warranty.

[@82_KID]

@@GNX157 OH yeah. Under warranty for sure. I have a Subaru EJ251 and I'm almost certain it had head gaskets replaced under warranty. If I don't have an issues when it gets hot out I don't even need to worry about it.. (I bought the metal "turbo gaskets" AND head bolts anticipating it needed to be done. I am very very happy my high mileage engine SEEMS to he okay. I drive many thousands of miles...)

[@KrustyKlown]

We call that "Donut Cop Valve Stick" at our shop.

[@michaelknorr6825]

Some cars use a cold start valve to enrich the mixture. That can develop a situation where it wont close completely. Sell the oil. If you smell raw fuel, id start there.

[@keltecshooter]

That side cylinder head has major issues, very common and I've done several , Also be warned, when replacing 02 sensors use OEM and make sure they don't get mixed up , you will chase a stupid misfire that makes no sense.

[@keeney413]

Should you have started with a relative compression test before putting the injector in?

[@wolfewispr]

subscribed, have you ever seen the 2004 chevy malibu high rev problem? my mother has one that just suddenly starts revving up, to the point its at 5k rpms. I replaced the throttle body, iac, egr valve, throttle position sensor, a pcv hose. and a few other things. i made sure the inegr passages were clean. The dealer can't fix it. and so far i can't either. car only has 32k miles. whenever i replace the throttle position sensor it runs perfect for a day or two then right back to revving high. mom had a fender bender because it revved to 5k at a red light. and she's too stubborn to stop driving it.

[@donames6941]

One more reason i wont buy a newer car give me old school car maybe not the best on mpg but far less headache to me

[@derrickcook8593]

I had a 2014 jeep wrangler that had both heads go bad b4 76 thousand miles. What a joke.

[@lou6749]

Stay away from FCA automobile Fiat Chrysler Automobile..

[@mmingle57]

Interesting video Kenny, would have been neat to find out whether the dealer covered the problem. It’s seems like in today’s times when the manufacturers are building such crap and gouging consumers Pocketbooks, they are turning a blind eye for repairs on such poor quality in every domestic product they are putting out! You don’t have to go far to see gm’s lifter debacle and the giant engineered deceit they’ve created there or ford’s 5.4L 3 valve triton I believe, or dodge’s hemi engine head problems and transmission quality problems that they are giving consumers the run around!!! Hell you’re getting Chinese parts in a bag from an OEM GM parts department!!! That’s just a few problems that doesn’t include all the small turbocharged POS that the manufacturers are building! You Kenny know it cause you’re in the business of fixing the POS!! Too bad 90% of most human beings don’t understand how bad the domestic car & truck industry has come! The quality doesn’t match what the domestic auto industry is pushing out there! Kinda sad times for the consumer because of the insanely poor Quality versus the insanely greedy high prices they have on these products!!! They’re BLEEDING HUMANITY DRY with POOR QUALITY cars and trucks along with insanely OVERPRICED PARTS and REPAIRS!!! Every repair starts from $500 up through Thousands of dollars!!! That’s what happens when the government gets involved!!

[@johnadams3053]

Well I would say it’s more likely greed, and incompetence from company leadership. But yeah you’re right.

[@williamwhite9767]

On the old Pontiac V8s back in the 70s, the #2 cylinder on the crank was considered #1for timing purposes. I found out the hard way on my used 72 455 Grandville.

[@merrillschaps2325]

I've owned several Dodges. I had a 1969 Dodge Charger R/T with the 440 Magnum, 1999 Dodge Dakota pickup, and a 2004 Dodge Neon SRT4. The '69 Charger I had was the best car I ever owned.

[@HouseCallAutoRepair]

@14:20 ... I did forget, while filming... It's been a year since I started it.... Hasn't been put back together yet. My poor Crown Vic! (It's in the background of many of my vids)

[@HouseCallAutoRepair]

Might be a rabbit hole, but me personally, would have been all over that half dead upstream O2 (B2S1)

[@FreedomInc]

Could also be a bad cam/lifter. My buddies hemi challanger just had the same issue. Lifter ate the cam lobe. His is a 2011 6.4 hemi challanger. Different symptoms. Just talking. Obviously his misfired constantly. The shop he took it to put a cam lifter kit in it. Had a bad tick immediately. 600 miles later the shop had to put another kit in it. Feom what I've read when the hemis specifically have this issue. Dodge won't even put a cam in them if they are under warranty. They replace the entire longblock.

[@greggc8088]

I've experienced a few burned valves on that 3.6 even newer than 2014 in which compression tested good and it was only by using the process of elimination we arrived at removing the cylinder head to find the valve damage. If the plugs were easily accessible, a running compression might reveal it but the leak down tests didn't always show it but often did.

[@crautoguy8384]

I wouldn't ignore that Close loop code I've had thermostats and ECT Caused misfires by overfueling the bank Ever on toilet but I had a Dodge 4.7 Ram that ran me around in a circle for a while I replaced all the packs plugs found a leaky injector thought that was it It's all that was fixed then it set a code no Close loop operation What it Was crusty coolant around ECT Also had a flash 02 on that bank replaced ECT thermostat put factory 02 fixed it. It would intermittently stumble and hesitate in parking lots every once in a while as the original complaint Would throw a random misfire code. That was a Dodge.😢

[@williamfry6087]

You have to be a computer nerd/expert, a surgeon, and electrical engineer. Kenny is the boss. You have a lot of patience. thank you

[@frankellison]

Hi Kenny Working on a 2008 Passat 3.6 Need to replace O2 Sensor 1 bank 2. What side of engine is bank 2 when looking over and down back side? Front of engine facing passenger side transmission on driver side. Thanks if you can help and for all your educational videos.

[@kentearly805]

I see this all the time on bank 2 generation 2 pentastars all the way up to 2016. Normally cylinder 2 but sometimes cylinder 6. Never cylinder 4 for unknown reasons. Cold compression test tells all!

[@ginog5037]

What a pile of junk! All that plastic, just chasing problems. Was it covered under warranty Kenny, or is it now a boat anchor?

[@petehenderson]

U did all that work and didn't check compression junk

[@spaceghost8995]

Buy a used Honda and you won't regret it. That's all I drive. Not one misfire or bad injector in the last twenty years. Five different cars . Not ONE single engine problem outside of water pump or alternator.😂

[@Franklinveterinarycenter1of4]

you are going to take off like a rocket with such awesome video skills and ability to communicate what you know.

[@volsguynga]

Can't hear you. Like to see you wrenching but need some sound. Keep up the good work.

[@82_KID]

I don't even really watch other auto repair channels. No point to.

[@harveypaxton1232]

Would a compression test confirm that it has a burned valve?

[@johnw9637]

Bad lower intake gaskets they shrink when cold expand when hot if it was a valve it would do it all the time

[@oldbiker9739]

I've only owned one dodge in my life time , it was a 1975 power wagon .

[@GTIFabric]

Wise decision

[@johnbishop7912]

Great Job Kenny - keep up the Excellent Work you are doing sharing your experience and knowledge with all of us here on KZbin ! Kudos to you, Brother ...

[@Brian-nf6bt]

Well Kenny so you thought it was a coil on 2 so why did you not start there and swap a coil and see if the fault moves,fairly basic stuff I will be honest and tell you I stopped watching at that point.

[@crautoguy8384]

Those injectors I replaced a ton on those motors Is fiat junk

[@knoester7714]

Thank you Kenny for sharing your knowledge and insight.

[@geraldguenard4095]

your microphone is to far

[@CajunShrek]

Visual with a bore scope

[@toenails.]

Keep the Dodge in the garage

[@sheerwillsurvival2064]

I used keep mine in the garage till race days then I went to drag strip and dominated Chevys and fords 😁

[@dogshltsniffer9933]

I’m a certified master mechanic who had a terrible coke problem. One night while grinding my teeth trying to understand the complexity of a fuel injected motor when I dropped an 8 ball right into that mother fucker!!! The coke fixed the hesitation that was present when accelerating! I then realized I was staring at a stranger’s vehicle and they didn’t want me working on it and running around them throwing coke in the air like it’s rice from a shitty wedding wasn’t what they wanted me to do either. Cops were involved, long story short cocaine doesn’t help your motors. Also? Believe it or not but I’m NOT a master mechanic like I had thought I was just a drug addict. Cocaines a hell of a drug.

[@MrBeefsnorkel]

i was a tech at Toyota for 7 yrs, the same thing would happen to the current generation Tacomas. Not ALL of them, or most of them, but a lot of them would burn/otherwise destroy exhaust valves on bank 2 (usually cyl 4) it would happen inexplicably for seemingly no reason. have to drop upper and lower oil pans, front diff, remove engine just to replace the head. paid like 11 hours. highway robbery

[@timbow50]

EVERY DEALERSHIP robs people every day. Many don’t have mechanics that have the ability to honestly reliably diagnose a vehicle. They DONT WANT TO because it makes them more money to just throw parts at it. Mechanics get paid % of parts and the dealership makes a fortune on parts. Highway robbery. Never use a dealership if at all possible. And nowadays their OEM parts can be made from several companies and are not true OEM. You’re told they for extra high pricing. Again, thievery at its best.

[@aaronkoivu]

Chrysler pays 7.8 hours for the #2 side head replacement

[@colt2206]

Nice job. I was a little lost but looks like you did excellent job getting that hoopty running good

[@pickle5051]

Intermittent guessing at it

[@kayoss662]

I replaced a broken oil cooler housing on 130,000 mile my 2011 grand Cherokee With an aluminum one. While I was there, I decided to change the plugs and had the injectors out and had them cleaned also. I should’ve changed the knock sensors while I was at it but so far, I haven’t had a problem with them. But the factory plugs were incredibly worn out. Runs great, My mpg seemed to have increased by 2. But sure don’t want to that job again.

[@UncleFred-mb4eq]

Pretty sure I’m having this issue with my 2014 Malibu 2.5L. I swapped coil packs and the misfire remains on the same cylinders. I also replaced all four injectors and although the car runs a little better the misfires remain on those same cylinders. My theory is it’s either a warped cylinder head or the VVT high lift mechanism on the rocker arm is bad on said cylinders.

[@FixIt1975]

Carbon on intake valves can cause misfires on cars with direct injection. Mostly when cold and at idle

[@davidcamron8494]

I remember a thing with Saabs. Before you unloaded them they'd rushed out with coil packs and fixed itb

[@funnydubby6401]

Does that figuring out which bank is bank 1 trick work for pretty much all engines??? I’ve never known that

[@robertmedina6875]

You didn’t bring it up but I’m Chryslers I found that I can only use OEM dealer O2 sensors for it to work for me. I don’t know what your experience please share thank you Kenny

[@psdaengr911]

The diagnosis was correct; the initial guess wasn't. When you have an issue with a complex machine, guessing the cause is not making a diagnosis. It's a place to start the troubleshooting process. A scope and pressure transducer might be able to capture the misfire and capture a better real time picture of what was happening. If the valve is sticking and you shut down while it is happening, a bore-scope could check its periphery and scorch patterns for evidence.

[@CajunShrek]

I never understood why people buy a sports car and always driven it like granny on Sunday and never stretch those horses out time to time... At least once a week.

[@lakesautomotivediagnostics6509]

I have ran into a few of these always confirmed with a leak down test, but the give away is the misfire at idle and soon as you touch the gas, it goes away, hope you have a great day😃

[@MatsuYoda]

Just did the filter housing on a 3.6 in a jeep yesterday. That was a fun one. Wasn't really that bad

[@deeznutz3494]

Something’s telling me it’s just the o-rings at the bottom that leak, cuz they always look to be in poor shape once removed… but we always just change the whole thing anyway. If it was my car I’d experiment

[@dbspecials1200]

It's awful...trees having sex all over everything.

[@scott196464]

Not convinced a burnt valve will come and go ? I would give it a good flogging while cold.

[@fieldsofomagh]

Can't beat the experienced mechanic who can pinpoint the fault almost immediately from day to day, hands on, repair work. Saves a lot of head scratching and deposits in the swear jar. Idle time issues might indicate over heating in area's of the engine hue to bad coolant or oil circulation. Certainly seems to highlight a basic design problem when not all the engines are problematic.

[@thomashodges6104]

I remember one time that I had my intake off a 5.0 . u put a shop rag in the valley and forgot it when I put the intake back on. I drove the car for a year or so before I took the intake off again. Lucy .

[@neutrodyne]

This video shows that there is no substitute for experience.

[@mathewpennington7049]

Had a 07 Tacoma 4.0. 325,000 miles original plugs and coils, still ran better than some other vehicles that come up on the mountain here.

[@johnmadow5331]

That the reason why I stop buying American car. I can not effort spending 1-2K to fix this type of problem! My Japanese Made engine never exhibit this type of issue.

[@Wakeupandsniffthecoffee]

It's too bad that engines are setup the way they are. Bending over an engine really puts the legs, knees, lower back and neck in some awkward working positions. I would love to see an engine that with minimal effort, would slide right out to the front or side, so it is possible to work on any part of it, without having to be a contortionist. I need to replace various gaskets on my 2006 Kia Sportage. I'm not positive which ones are the main problem, but it would be a whole lot easier if I had access to all the sides of the engine.

[@plankton199]

Unlucky Costa

[@bikerman54]

Maybe put a camera down there to look at the valves.

[@GeorgeTaylor-q5b]

Great Channel!

[@jimr5703]

air flow keeps it cool

[@garya9875]

Definitely educational.

[@billmalec]

How the heck do you wear a seat out that bad that fast? 😮

[@JeffinTD]

Since it tends to happen on lightly driven vehicles I’d guess deposits build up until the valve doesn’t fully seal. Once combustion gasses start bleeding through, erosion, and the valve overheats

[@jensenwilliam5434]

Thank you!!

[@aaronkoivu]

Cylinder leak down test? Percent of leakage? How do you confirm it’s a exhaust valve problem? What about lifters, or rocker arm on cylinder #2

[@saucemasterx911]

Kenny on what police vehicles and year would you see this on?

[@77perudo]

Same engine in my moms 2015 grand caravan. And cyl 6 was misfire and we did a compression test to verify it was losing compression and yeah. Replaced the head. Burnt exhaust valve. Also the valve guide was out of whack. Pentastar engine has lots of issues. Also the flex plate 2 times had to replace it. Another fun job. Said no one ever. Great channel. Great content as always.

[@slowquest]

Had a 2014 Jeep Grand Cherokee 3.6 with these EXACT symptoms. I found a broken valve spring on the misfiring cylinder. Replaced that and has run great for 2 years now. It was very weird, if you ran it hard right on start up, it wouldn't misfire, but if you drove it gentle it would do it almost every time. If you drove it through the misfire, it would clear up and run great after just 2-3 minutes.

[@edyacheraii4279]

Sometimes if it’s sticky valves right before doing an lof put a quart of kerosene in the crankcase and let it idle for 20-30 minutes then change the oil cleans valve stems, passages, and gunk out of the engine. Then change your oil and filter and recheck when it’s cold to see if the misfire is still there after you swapped out both the coil and injector

[@eddiereichel9354]

Those 3.6 have issues with dropping exhaust Valve seats on cylinder 2.

[@germanjesus]

I wonder if it’s a older motor cause you are correct 👍 Trade it in Or sell it to a stealership

[@ron1836]

If the valve was burned it would never stop missfiring. I would think it's an oiling issue. Makes sense that if you drive it hard and goes away warm that it's something with the valve hanging up.

[@robertdiehl9003]

Now I can see why Governor Murphy of New Jersey banned plastic shopping bags at grocery stores in N.J. & N.Y. banned plastic forks at restaurants because Chrysler products consume so much plastic when building their automobiles.

[@jaymartin5434]

I was going to say a compression test first thing . knowing all the parts the guy had changed .

[@billk9628]

Funny that that is the issue, in diesel those issues are usually caused by lack of fuel. Which is why they used to run a pyrometer on exhaust. It helps the driver know when to down shift under heavy load. But it will also happen when ignition timing is off slightly. I used to build and dyno diesels, and getting them to make spec HP without high exhaust temps requires a lot of tuning skills. If this was an issue with Mopar stuff, I'll bet that the computer spec is just a bit off, and that is why they burn valves. Probably a calibration issue.

[@sheerwillsurvival2064]

This was a great video. And I agree I always have my foot in to my 2013 and have been so lucky with my Grand Cherokee. Totally think you’re right 👍🏻👊🏻

[@HUBBABUBBADOOPYDOOP]

Strange. Incredibly small geometry discrepancy. Does it set the CEL telltale? If not- I'd just live with it.

[@wayneimazumi5299]

Common problems on those v6 when I feel a misfire I automatically do a compression test if compression test passes then I recommend coils and plugs

[@gangstalifers-4312]

fuel pressure?

[@eddiereichel9354]

​@@gangstalifers-4312 fuel pressure would affect whole engine.

[@wayneimazumi5299]

@Eddie Reichel some times

[@stss9552]

Cylinder 2 misfire on these 3.6 pentastars always leads to a bad head, it has to be a design flaw because it’s always that cylinder.

[@Wakeupandsniffthecoffee]

Here in Virginia the pollen and dropped flowers are coating everything too. Where are you located?

[@garyr7027]

I can't imagine just one cylinder having miss fires if its just been grannied around with lots of idle time, it should effect all the cylinders the same? Why just one cylinder? Damn this new tech... drive a guy insane. Man I'm old school although I know a few things about newer tech, it's bull crap designed to fail junk imo. One slightest thing and you're left scratching your head for days on it... geez 🙄 Guaranteed before I pulled a head off for this issue I'd try everything I could think of first.

[@brianturner4382]

Bad o2 will make these engines misfire. Because of wrong air/fuel mixture. After market will not work. Oem is a absolute must. ( Denso) these engines are extremely oem specific

[@lawrencecavens5760]

Did you try your fix of tranny fluid in the engine to see if it clears the varnish off the valve stem? that is what I would of tried first. But! warranty is warranty...

[@gwh21375]

Noid light works well for testing injector pulse.

[@ferdiwilken1789]

A compression test would have shown the fastest.

[@jcnikoley]

If it’s the case of a valve sticking, is it possible Seafoam treatment through the intake could help?

[@Derbittguy]

Sometimes it's hard to tell which is the fowardmost bank. Bank 1 will also be the bank that contains the number 1 cylinder.

[@reneg1366]

Good info

[@stevenekdahl7124]

The best preventive maintenance you can do to prevent burnt valves on a pentastar is run premium gas.

[@georgepaiva7496]

What size was the engine

[@WrenchingWithKenny]

3.6

[@danielberto9297]

Known for cam..do to roller on rocker bearing wiped out...very common