I bought this car with a check engine light on, I know not a smart move but I could not pass on the chance to own a 4.2 allraod.
http://www.audizine.com/gallery/showfull.php?photo=80380
So I purchased a VCDS cable and found:
Chassis Type: 4B (4B - Audi A6 C5 (1998 > 2006))
Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
75 76 77
VIN: WA1YL64B75N025037
Address 01: Engine Labels: None
Part No SW: 4D0 907 560 DC HW: 8E0 907 560
Component: 4.2L V8/5V G 0010
Revision: 00000000 Serial number: AUZ7Z0D2695394
Coding: 0007755
Shop #: WSC 02334 785 00200
VCID: 6ADBF1D1466D6971D1F-5140
5 Faults Found:
17538 - Fuel Trim; Bank 2 (Mult)
P1130 - 001 - System too Lean
16558 - Fuel Trim; Bank 2
P0174 - 001 - System Too Lean - MIL ON
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
16685 - Cylinder 1
P0301 - 001 - Misfire Detected
16687 - Cylinder 3
P0303 - 001 - Misfire Detected
Readiness: 0110 1101
I am a shade tree mechanics helper at best, but being a full time architecture student and father of two I need to attempt at least to fix what I can. The car has 124k mile on it so I decided to remove the spark plugs and replace them. This is what I found:
http://www.audizine.com/gallery/showfull.php?photo=78231
All eight looked like this, so i replaced them all as well as the valve cover gaskets and coils. I saw no change. I subsequently replaced the fuel, MAF, and air filter as well as swapped the injectors from L to R. After this I grew frustrated and delivered it to a local shop here in Charlotte that specializes in European cars and has done work for me in the past. They did smoke testing for vacuum leaks, leak down test on each cylinder, replaced a flex joint in the down pipe. There is a slight improvement at idle as it doesn’t quite remind me of my old 69 big block fairlane. Other than that they were as baffled as me and threw in the towel. Here is a video of it running:
https://www.youtube.com/watch?v=-U9JHSsSWqc
Do any of you guys have any ideas? Should I just give in a take it to another shop? Dealer(cringe)? Swap in a 2.7?
Thanks