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rpmdiag, Tech and Instructor
Category: Audi
Satisfied Customers: 6702
Experience:  Since 1975
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Audi A4 quatro 2.0 turbo: 2010 Audi A4 quatro 2.0, Running

Customer Question

2010 Audi A4 quatro 2.0,
Running rough, 6 codes as follows,
P050600 Idle control system/ rpm lower than expected
P030100 cylinder 1 misfire
P030300 cylinder 3 misfire
P030200 cylinder 2 misfire
P130A00 cylinder deactivated
P03000 random/multiple misfire
Pulled plugs, white crusty all over them, replaced still all same codes. Replaced all 4 coils with new, still same codes. Looking over the internet, found several comments on PCV valve. So I pull oil cap off while it's running and ithas tremendous vacuum pulling the cap on. So not sure if this means a bad PCV, vehicle runs the same with cap on or off. Any ideas?
Submitted: 6 months ago.
Category: Audi
Expert:  rpmdiag replied 6 months ago.
Hi, I’m Ron and I can help you.I have been in this business since 1975 and also teach automotive repair. I am confidentwe can resolve your problem together. Please understand that I don't know your skilllevel. I can't see, smell, hear, or touch the vehicle either, so it may take a few replies toget to satisfactory results. Please be patient!I also try to give all of the information you may need, expecting a “positive rating” inreturn. I will also continue assisting you after you have rated me, if necessary. If thereis any reason I cannot get a positive rating, please let me know why “in advance”, so Ican go another direction for you. I am sorry you’re having this problem; I’ll help youthrough it. A weak fuel pump, vacuum leak or plugged injectors will also cause those codes.Thanks, Ron
Customer: replied 6 months ago.
Car seems to come out of it and run better at higher rpms, any way to test injectors before I just start replacing them, I am a pretty competent mechanic although I build off road buggies and don't repair cars for a living, and can test fuel pressures, just don't work on Audi's to often and trying to help my sister out.
Expert:  rpmdiag replied 6 months ago.
You need to test injectors with an injector tester. You need to check for vacuum leaks with a smoker. You should scan this thing first and check the freeze frame data and MODE 6 too.Thanks again, and please don't forget to rate me and keep this link in case you need me again later on.Ron
Customer: replied 6 months ago.
OK tested fuel pressure, running about 48lbs needle not solid bounces between 46-50lbs is that normal?
Expert:  rpmdiag replied 6 months ago.
Okay, we're back to the injector tests and scan tool tests like I said before.Ron

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