Cylinder misfires, car shakes driving & at idle, much more..

[yeojdas]

http://youtu.be/c0msRk6X8Nk

Hello everyone, I attached a video of me explaining everything going on. I would really appreciate anything. Thank you guys.


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[Fburg A4]

Scanning for codes is a good initial step

[yeojdas]

Scanning for codes is a good initial step

I will definitely come back with some codes. I went recently to get it diagnosed and the guy said he wasn't allowed to give me the codes lol Doesn't sound right.


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[Fburg A4]

Well hopefully the codes lead you in the right direction. At the very least they may identify which cylinder(s) is misfiring to narrow down the diagnosis.
Did you somehow verify that you actually have a good oil level besides just having an oil change performed?

[Crucible35]

Probably needs an Oil Level sensor replacement to clear up that issue. The misfiring, since they have already gone down the path of looking at coils and spark plugs, may be carbon build up. Not as familiar with the 3.2 but I do recall that they were somewhat prone to carbon. Hopefully someone with the 3.2 can jump in.

[jrodrigo621]

I would clean up the solenoids and buy the coil kit! Its better to change all the coils because you wont be having in the future more problems with each coil you havent changed.

[yeojdas]

Well hopefully the codes lead you in the right direction. At the very least they may identify which cylinder(s) is misfiring to narrow down the diagnosis.
Did you somehow verify that you actually have a good oil level besides just having an oil change performed?

So I got the codes..
P0301
P0303
P0304

The mechanic said cylinders 1,3 and 4 are misfiring and I need a fuel injector replacement.


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[yeojdas]

Probably needs an Oil Level sensor replacement to clear up that issue. The misfiring, since they have already gone down the path of looking at coils and spark plugs, may be carbon build up. Not as familiar with the 3.2 but I do recall that they were somewhat prone to carbon. Hopefully someone with the 3.2 can jump in.

Is taking care of carbon build up difficult and expensive? Just curious because that does sound plausible.


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[yeojdas]

I would clean up the solenoids and buy the coil kit! Its better to change all the coils because you wont be having in the future more problems with each coil you havent changed.

I actually did replace all the coils and spark plugs. I was told last night at the mechanic that I need fuel injectors replaced.


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[Fburg A4]

So I got the codes..
P0301
P0303
P0304

The mechanic said cylinders 1,3 and 4 are misfiring and I need a fuel injector replacement.


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3 injectors for a cold start misfire? Well I hope the diagnosis is correct because at the cost to replace those injectors it better work.
If they are just gummed it might be worth it to try some injector cleaner.

[richardm0025]

That sucks if it's injectors since they have a extended warranty for the 2.0t up to 120k miles. Call the dealer to make sure there isn't any extended warranty for yours.


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[yeojdas]

3 injectors for a cold start misfire? Well I hope the diagnosis is correct because at the cost to replace those injectors it better work.
If they are just gummed it might be worth it to try some injector cleaner.

Let me just say, I appreciate your help.
I actually did try Chevron fuel injector cleaner a few months ago when the problem first occurred. Followed the instructions, full tank of gas and cleaner and it fixed nothing ): what else could it be if not the injectors?


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[yeojdas]

That sucks if it's injectors since they have a extended warranty for the 2.0t up to 120k miles. Call the dealer to make sure there isn't any extended warranty for yours.


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Unfortunately, I bought the car used from a private party. The car was perfectly fine for two or three months then this started happening.


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[yeojdas]

Also, you said it could be carbon. Maybe one treatment of that fuel injector cleaner wasn't enough? Should I just get it professionally done? Sorry I'm so inexperienced with all this stuff and naive. This is my first car ever and I'm only 20.


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[Fburg A4]

Well it could definitely be the injectors, I'm not saying it isn't. It is just that before you pay to have them replaced, it would be nice to know what they did to diagnose the problem to arrive at the conclusion that the injectors are bad. If they think they are bad because the plugs and coils were already replaced, then that isn't a very good diagnosis. If they did something like an injector balance test and found those particular injectors showed a lot less drop in fuel pressure compared to the other "good" injector, then that is a good indication that the injectors in those three cylinders may be plugged or the pintle is sticking on initial start up but later working better when they warm up a little. I guess what I'd do is a.) ask what did they do to diagnose it and b.) ask the shop what if you pay 800 bucks to replace those injectors and you still have the problem. Do you get a refund or another bill when they think of the next part they feel like swapping out? There are a lot of parts chuckers out there and it can get expensive real fast.

As far as an injector cleaning and carbon buildup, I know on the 2.0T it is direct injected so a fuel injector cleaning would not help carbon buildup on the intake valves. The injector cleaner would help with issues in the injector itself which could be a problem.

[Fburg A4]

Oh, BTW there is a cold start misfire bulletin for the 3.2 v6. The bulletin calls for reprogramming the ECM. Might want to look into that before you spend money replacing parts. It's #2011732. Says it is for certain model years so you might have to check if it applies.

[Jacon]

So I got the codes..
P0301
P0303
P0304

The mechanic said cylinders 1,3 and 4 are misfiring and I need a fuel injector replacement.


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Could be that the injectors are leaking overnight and causing the misfire upon cold start (injectors leak fuel into the cylinder and create a premature burn). Another step would be to switch the injectors, keeping track of which ones you moved where and see if the problems persist. There are a few things to troubleshoot first before dropping major coin on injectors.

The ECM update would be a good start too.

This has nothing to do with carbon build up.

[yeojdas]

Oh, BTW there is a cold start misfire bulletin for the 3.2 v6. The bulletin calls for reprogramming the ECM. Might want to look into that before you spend money replacing parts. It's #2011732. Says it is for certain model years so you might have to check if it applies.

Okay so I just went to ANOTHER mechanic and what this guy said made the most sense out of all the mechanics I've been to. I already forgot what the part is called but it's some valve and it pushes oil into the engine. There are two of these valves in the car and apparently they're torn or messed up. It's in the engine. Do you know what he's talking about because I already forgot what the part is called /:


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[roxta]

Okay so I just went to ANOTHER mechanic and what this guy said made the most sense out of all the mechanics I've been to. I already forgot what the part is called but it's some valve and it pushes oil into the engine. There are two of these valves in the car and apparently they're torn or messed up. It's in the engine. Do you know what he's talking about because I already forgot what the part is called /:

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I had the same codes. In my case the breather valve was clogged due to my burning oil issue. It wasn't injectors in my case. Cause of me burning oil was worn valve guides. Replaced the breather and the problem went away, for awhile.

[yeojdas]

I had the same codes. In my case the breather valve was clogged due to my burning oil issue. It wasn't injectors in my case. Cause of me burning oil was worn valve guides. Replaced the breather and the problem went away, for awhile.

Is the breather valve the same thing as a PCV Valve? The guy said there are two or three of what I need. He said the part mixes oil in the engine or something like that.


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[The Infiltrator]

I'm just adding what's going on with my car for future reference.

My car keeps cutting out when I get on it between 3-4k usually. It's building psi but I'll have to watch my gauge a little better and see if it jumps when my car does from cutting out. It feels like the engine is jerking out of the mounts when it does cutout it's really quick cutouts, as if you are turning off and on the gas in less than a second. Everything is normal otherwise and no check engine light or misfires when I go in with VCDS.

I was told I'm probably getting detonation / misfires so I'm changing out plugs to start with.

I have this setup on the car now with the .028 gap.
https://www.ecstuning.com/ES2535339/

I just bought NGK laser platinum's and have to shorten the gap from .032 to .028. I'll update here with results.
http://www.oreillyauto.com/site/c/de...3435&ppt=C0334

[The Infiltrator]

New plugs and I gapped them to .028 since they came .032



Old plugs gapped at .028 on install and after removal the gaps are now .031 after only 10k



Test drive this weekend to see if this fixed the issue.


Edit: that was it, all fixed up and no more issues.

[shayan_a4]

so i got a misfire on bank 2, waiting on the ignition coil

[The Infiltrator]

Just throwing this in here since no one has posted it yet.

[yeojdas]

Oh, BTW there is a cold start misfire bulletin for the 3.2 v6. The bulletin calls for reprogramming the ECM. Might want to look into that before you spend money replacing parts. It's #2011732. Says it is for certain model years so you might have to check if it applies.

Could be that the injectors are leaking overnight and causing the misfire upon cold start (injectors leak fuel into the cylinder and create a premature burn). Another step would be to switch the injectors, keeping track of which ones you moved where and see if the problems persist. There are a few things to troubleshoot first before dropping major coin on injectors.

The ECM update would be a good start too.

This has nothing to do with carbon build up.

I had the same codes. In my case the breather valve was clogged due to my burning oil issue. It wasn't injectors in my case. Cause of me burning oil was worn valve guides. Replaced the breather and the problem went away, for awhile.

Just thought I'd let you guys know.. I got rid of my A4. I ended up finding out it was apparently much worse than I thought and it could cost thousands to fix according to the mechanic. Traded it in and ran away with what offer they gave me. Just got myself an upgrade though... A 2014 A4 2.0T with little miles on it. Let's hope this one treats me better. Thanks you guys.


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[A4 Centaur]

Good to hear!

What did the mechanic say about the mechanical issue?

[yeojdas]

Good to hear!

What did the mechanic say about the mechanical issue?

They all said the same thing.. It's an internal problem and if we want it checked out and fixed, it'll cost thousands. They were all really very unprofessional. It was disheartening. I gave up. I got my new car and I've had it for two weeks now and I'm gonna be honest, I miss my old audi. This new audi isn't cutting it. I don't know what it is ):


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