Serious Misfire, Shaking at idle, not coilpacks 2005 B6 S4
04-11-2011, 11:14 AM
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07-13-2011, 12:47 PM
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08-10-2011, 10:17 AM
#15
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I had similar issues and codes with my 2007 S6. After replacing the coil packs, spark plugs, intake manifold motor, re-programming the throttle body, performing the 55k service, and a full carbon cleaning, it still threw flashing codes, bogged down, and noted multiple random misfires. Finally, they changed all 10 of my fuel injectors and, viola!, the car runs like a dream, accelerates like a bat out of hell, and no longer throws codes. Everything was done under warranty but I lost the use of my car, collectively, for over a month.
08-10-2011, 10:31 AM
#16
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I had similar issues and codes with my 2007 S6. After replacing the coil packs, spark plugs, intake manifold motor, re-programming the throttle body, performing the 55k service, and a full carbon cleaning, it still threw flashing codes, bogged down, and noted multiple random misfires. Finally, they changed all 10 of my fuel injectors and, viola!, the car runs like a dream, accelerates like a bat out of hell, and no longer throws codes. Everything was done under warranty but I lost the use of my car, collectively, for over a month.
08-10-2011, 11:05 PM
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I had the same issue begin happening to me 2 days ago at the end of a tank of gasoline just after i added Chevron Techron Concentrate Fuel System Cleaner (for 12gal treatment). i think it is the fuel system messing up. I work for chevron corp and will be reporting this to them to see if this is a common issue. i will be changing my fuel filter first then following this list of checks:
1) check and clean MAF sensor (new one is $30)
2) check fuel pump (i doubt anything is wrong with it.)
3) replace cam shaft position sensors ($30)
4) replace spark plugs, coil packs, and injectors ($1,000 it needs it anyway)
5) check the chain tensioner.
6) if I find that it is the fuel system components i am going to my complain to my company for screwing up my car
7) post my results and hopefully help you and others out.
2004 Audi S4 $111k miles
1) check and clean MAF sensor (new one is $30)
2) check fuel pump (i doubt anything is wrong with it.)
3) replace cam shaft position sensors ($30)
4) replace spark plugs, coil packs, and injectors ($1,000 it needs it anyway)
5) check the chain tensioner.
6) if I find that it is the fuel system components i am going to my complain to my company for screwing up my car
7) post my results and hopefully help you and others out.
2004 Audi S4 $111k miles
09-18-2011, 08:11 AM
#19
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I had the exact same thing happen on a road trip near the end of a tank of fuel in ~100 degree temperature. The car cooled overnight and started fine the next morning. After several on/off cycles, the code cleared itself. I had a basic reader with me but not a Vag and I didn't clear the code because I wanted to research when I got home. Fortunately, it just cleared itself...
-h
-h
12-16-2011, 02:22 AM
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hello i have 2004 s4 v8 here in my workshop doing the same thing same codes same missfire engine is now on its way out what a job thing is every thing you see like flywheel clutch crank sensor temp switch all needs doing as they are so easy to do wen engine is out cost is amazing will update wen engine is stripped
