How to Diagnose a 2014 Chrysler Town & Country 3.6l with an Engine Misfire - P0300 P0305
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- Опубликовано: 2 окт 2022
- A tricky misfire diagnosis is no match for Bernie. In this video he tackles a misfire on a 2014 Chrysler Town & Country (minivan) with a 3.6 liter engine. Spark plugs, fuel injectors and ignition coils have already been installed in the engine and those new parts did not remedy the problem.
When reviewing scan tool data, the engine is running rich (-33 on both banks) and low engine manifold vacuum (2.3 HG). There were two DTCs stored, P0300 Random / Multiple Cylinder Misfire and a P0305 Cylinder #5 misfire. The low engine vacuum is causing the fuel tirm issue. This engine is a speed density system., it used a manifold absolute pressure (MAP) sensor to determine load. With low vacuum, the ECM assumes there is a load and adds fuel.
Using eSCAN’s built-in relative compression test, two low cylinders are identified. Next, the eSCOPE with the low cylinders are identified using the built-in CKP Misfire detection tool. Cylinders 1, 3 and 5 are misfiring. Bank 1 (the right side of the engine) is misfiring. Tailpipe pulses help to confirm a timing issue and then finally the root cause is determined by testing cylinder pressure (using a pressure transducer), a faulty VCT (camshaft actuator / phaser control) and faulty piston rings (blow-by).
Diagnostic equipment used:
ttps://www.automotivetestsolutions.com/escope-elite8 www.automotivetestsolutions.c... www.automotivetestsolutions.c... 
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Truly amazing how simple he makes it seem. The ability to follow the evidence and not just randomly test is uncanny. Years of experience at work. Watch and learn boys & girls, watch and learn 😎
Nice demo of MODERN diagnostic techniques and gear. I wish he had finished up by putting a camera in cylinder. SHAME on the other shops for WASTING customer's money on parts when they should have done a compression test and leakdown; part of engine troubleshooting 101 for nearly a century!!
That was absolutely brilliant Bernie, a very fixed methodical approach. Most technicians would have stopped once they found the phaser problem. Do very well done 👏 👏👏
I had to pause & rewind around 5 times in order to keep up with you though process, excellent tutorial 🙏🙏
Wow that was wild diag! Too bad they took the customer along for the ride... Impressive how you're able to manage all those channels and leads. I'd been tangled up in knot sitting in the corner! Lol thanks for sharing!!
I just had a 2002 CRV where they had done the chains and still the same issue of phase incorrect detected P0341. I ended up finding the time being advanced about 40 cam degrees. I unplugged the solenoid to ensure it wasn't being commanded on; same issue. I took the solenoid out and a piece of a mesh was missing, I recommended to replace that solenoid because there is no way it could be advanced any other way; waveform kept showing advanced as soon as it was started; I had them open up the valve cover to verify timing as I did not have my pressure transducer. After they replaced the solenoid, the car ran fine. What happened was that the mesh had been jammed inside the seat of the solenoid which was causing oil to pass when it should not have as it wasn't seating correctly. I actuated the solenoid and it worked fine before I advised replacing it.
first thing first compression test next leakdown test on 1 3 5 cylinders following the leak you determine if it's a valves or rings on compression test on 5 ads oil in the cyl and retest to see if is not a wash cyl by fuel ! if it's valves ex or int, cover valve off to see spings ,rockers or guides (those 3,6 have a real problems with guides valves ) if it's the 'ring you will know the blow by in the crankcase so my diagnostic is a guide intake valve dropped and washed the cylinder by fuel so you have blow by. it's well know that the head on 3.6 have problems and it's not rare for cyl 5!
It absolutely fills me with joy listening to your excitement of testing broken engines! I couldn't relate more, "cool for us! but bad for the customer!" lol
Thanks again Mr Thompson. Your gift is inspirational. Who doesn’t wish they could get all that info out of a waveform. Great job Sir!!!!
Great info Bernie, I don't need help I don't need sympathy I live in the Iona area of Lee County and I'm just glad I'm able to watch a professional give me information that helps me continue to diagnose and repair vehicles while working with VOIGTS Automotive (TONY)) in Naples he's allowing me to stay in the abandoned Circle K building on his property. I lost everything but my my morals my dignity or my ethics. God bless you Bernie keep up the good work
This guy is a phenomenal technician hands down
More awesome content!!! I get soo stoked when i get a notification Bernie's posted another video!!!
Years of experience and the right tools finds the problem.
I always look forward to your videos Mr Thompson..
a true diagnostician! Nice presentation.
Very cool diagnostics with a twist at the end!
Another great class, thanks a lot Bernie for this kind of videos
Thank you Bernie for sharing this info. You should have millions of subscribers with this content. that E scope is amazing in clarity of wave form.
This tech is so cool! You can diagnose the rings pretty easily without this gear though. Just do a dry and wet compression test. Observe pressure out of oil filler etc. No way of telling that the cam is advanced though without it!
Like every mad scientist....amaze by gloriuos unexpectation
Well done diagnostic!!!
Always good to see a master at work
What did I win
That clear-flood-crank said it all.
Hmm what I found was a lot of the 3.6l’s 2011-2015 have a failure in the valve train
Outstanding info in here. One of the best to ever raise a hood!!
Thanks Bernie, good to see you
Fantastic diog work!! 👊
interesting but might be a little overkill. bad hole check for spark drop a cylinder leak test. would have been all that was needed on this one. had the cylinder leak been ok then yeah i can see keep going with the scope.
I don't understand the parts throwing some shops do.
I've seen Nissans come in people have said it needs a transmission.
Meanwhile I fix the torn intake boot, clean the TB, do a IAL and it's fine.
Test don't guess. Another good one Mr. Thompson.
Great video
well they're definitely is a cylinder problem I will agree with you on that one I know there's not a cracked piston and that is the rings the old saying you squirt a little bit of oil into the cylinder it'll run over to the sides it'll get by the rings and then that should cause compression to change how come that was not performed
Great as always
amazing diag
Thanks Bernie that was amazing
Thanks Mr Thompson
That much blowby wouldn't be caused by a worn ring. We'd be talking a hole in the piston. Also, isn't it strange that all the problems are on one single bank? What are the odd that you'd have one bank with some radically worn rings and the other bank is near perfect? Also the problem bank has a radical difference in the amount of wear of each set of rings from cylinder to cylinder. I think a closer look is needed before a diag is complete.
Your right. But maybe a cracked ring or a stuck ring would also cause a real bad blowby. Or a cracked piston, and yes, a hole in the piston. Probably a boroscope would help. Maybe pouring some thick oil and running the compression test. The oil sticks to the bottom of the cylinder and so the oil would increase the pressure somewhat. Also maybe look at the spark plug, see if it has oil.
I would like to see a look into the offending cylinders with a borescope to inspect the cylinder walls/tops of pistons and see signs of oil in there.
Thanks for the presentation.
Bernie good job!!Way to go
Great job. you're awesome.
Good stuff. That's what can happen when you don't change the oil!
Awesome that’s what i call a real diagnosis ($)
i did NOT expect it to be more than cam or cam timing. the fact it had both going on is nuts. imagine diagnosing and selling an intake cam job only to find out it has tons of blowby afterwards. bad situation for the shop
I believe he did because of the engine mileage some engines are not worth fixing.
@@scientist100 I don't remember him stating the mileage what was it?
Great video thanks for the content and education. Could the cylinder be washed out from fuel due to not completely burning from the VVT issue?
Scotty Kilmer thinks highly of this man
Help needed with a DCT bro
Awesome video! But what is the probability that the problem cylinder is washed down and that is the high crank case pressure your seeing? Bernie is a master mind I would never second guess anything he says, but just wondering what his thought process was about cylinder wash.
As always great video, and very nice camera!
Support ATS y’all!!!
I've been using analogs scopes on engines dating back to the early 80s that was a lot more trying then because you couldn't freeze all the information or data you had to have a sharp eye and just watch
Thank you Bernie for sharing your brilliant knowledge.I would kindly ask for your expertise to shade some light over a crankcase unusual pressure waveform .Please, let me know the way I may send it.Thank you again.
Please Sir. Make a video about intermittent sticky valve , and how to diagnose it with the scope and pressure transducer👍🔧
The fix in this video is the vehicle needs a engine the piston rings are bad blowby has p0300 p0305 compression is very low on 2 cylinders
"The Man"
What was the cam and crank difference on scan tool since it was off ?
To be honest, I didn’t see that coming. Test, test, test!! Peace
It's 8 degrees outside got new battery month ago, alternator and starter good..makes noise when tryin to turn on but won't click over..we had prob of Thanksgiving and that we fixed it with the new battery now here we go again missing Christmas with our family.. husband lost his job too right after Thanksgiving because the van broke down. We got a 2011. Haven't had no issues since we bought 5 yrs ago ..now can't get it to b reliable at all. 🤦🏾♀️
Great video Mr Thomson this is why i don't drive Chrysler Products Or Ford products or Chevy Products Hondas' and Toyotas' Only.
You do know a certain era of Toyo engines have bad issue w burning oil. My mom's '12 Camry 4 banger is starting to. And Toyo says a quart every 1000mi is good to go.
@@brianmason8400 AGREED.
I have had very similar problems many times and during the disassembly the rings were fine it was problems within the Piston itself broken Land once the piston rings were removed the land drops down crack piston multiple times I truly would have liked to have heard it propose that way that there was a problem within the cylinder on the lower half whether it be the Piston or the rings or even a problem within the cylinder wall itself versus automatically accusing the rings just saying
I also would have liked to have seen a known good pattern of a cylinder because all rings do have a little bit of gas escape into the crankcase otherwise we would not need a PC system
How many miles?
Hey yall I have a question my wifes 2014 town and country 3.6 with 99k miles had a p0303 code which is cylinder 3 misfire I change the coil pack everything was good the light went off and ran fine she pulled in the driveway today and the light came on again so I checked it and it says the same thing could it be a bad coil or just the spark plug any help would be appreciated thanks
What would cause one cylinder to have bad rings? Scoping is cool I'm not experience with data shown.I'd disable fuel that cylinder and do a regular compression test dry and wet. Then leak down
OK Bernie you've diagnosed it now how do you fix it?
top
It seems to me you should disconnect and plug the pcv when checking for blow by.
I wonder how many " cave man " shops even do a relative compression test to at least get some direction BEFORE FIRING the parts cannon . How do they get away with putting in a PILE of parts and the car does the EXACT same thing ? Great double whammy diagnosis !
Yup. And shop shamelessly charges the customer, and sends them on their way. And customers just accept it. WTH?
Cylinder 5 walls washed with petrol, hence cylinder leaking pressure?
for every honest and knowlegable mechanics, there are 10000000 dishonest terrible throw parts at it lousy mechanics in this country.
How do you not know cylinder number 5 isn't merely washed with gasoline
Thinking the same thing. #5 washed out and possible leaky vvt solenoid.
The plugs would be wet...
@@mrblonde2013 Only if it is currently being washed. If the ignition is working that plug would dry off quickly. I've brought back compression in fuel washed cylinders multiple times.
@@Troy_Builtit's not like Bernie is new to the game. You'll have to take his word that the plug has never had a firing event in that cylinder based off his visual inspection when he pulled the plug.
I was thinking that, but would it really cause a that big compression loss?
Can't you just change the VVT and the car will run fine with bad rings?
Will never run fine with almost no compression.
I’ll admit a scope has it’s uses, but there’s no way I’m spending thousands on a setup that requires you to dissect mounds of data, when in this case anyway, you could come to the same conclusion faster and with a more definitive answer without needing known good waveforms, by using only conventional tools and the right equation. You’re getting lots of info from this tool no doubt, but I’m not convinced all bases are being covered here, and you could be setting yourself up for taking this engine apart a second time should something be missed
SUBTITLES PLEASE
Camera in cylinder visual and valve cover removal should be part of diagnosis IMO.
no need, he can actually see what is going on as components are moving, camera can only see when the engine is stationary, also, a leaking VVT will not show when you remove the valve cover, it will show in time because oil pressure is no longer present to make the phaser over advanced. As soon as you get oil pressure in there, the phaser is over advanced, I had this happen and I was trying to catch the phaser movement as oil pressure builds up but the oil pump is so fast, you can't even see when the phasers are advancing as the engine turns, crazy.
What are you going to see in the camera exactly? How are you doing to see the VVT Solenoid through the cylinder and how are you goin to see worn rings???
I would be curious to see if the cylinder walls are scored, or if cam lobes are rounded.
@@cincinnatusaurelius8371 worn cam lobes will cause the timing to be late, he had an advanced timing and you can see cam activity. Scored walls tells half the story, rings could be worn and that's what he suspects. Scored walls are usually caused by lack of lubrication. Rings will wear as they age.
even though those shops made a mistake by putting in those components I have to totally and I mean totally disagree with you for you making the statement that those parts never fix anything okay
MY SISTER HAS A 2014 TOWN C VAN WERE SHE TOOK IT FOR THEY LOOK AT IT THEY SAID IT IS BURNING OIL THEY TOLD HER KEEP LOOKING AT YOUR OIL AND KEEP ADDING OIL IAM NOT FOR SURE ABOUT IT I TOLD HER GET ANOTHER. OPINION SHE HAS SPENT TO MUCH MONEY THERE
If a cam was out of time, that would certainly set a P001x code... Right Bernie?
I'm not Bernie but it's possible with such poor running it likely isn't going to meet the parameters required to set the fault. Hopefully Bernie comes in here and tells us his thoughts
@@blehem I have never gotten an answer from Bernie in the comments section 😢😅
@@PineHollowAutoDiagnostics He doesn;t know he is on you tube or on camera. 🙃🙃🙃🤣
How much is the issue with the #5 skewing the in cylinder psi waveforms that showed a timing issue? And yeah, why wouldn't that set a cam crank correlation code?
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I like this scan tool, does it have bidirectional controls?
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Outstanding tutorial God bless you and all your family around you thank you so much for sharing what you know
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