hey guys,

I just bought this car last week. the previous owner put in Piper Cams, which is all and good...but its throwing misfire codes, i just pulled them P0300, 0301, 0302, 0303, 0304....makes 100% sense ... general misfire, then misfire in 1,2,3,4 cyl.

only problem I have with this right now is i need to register this and run it through DE state inspection

my scanner can erase codes, and right after that I try and read again and it reads 0 codes....but I dont know if that will work for the inspection lane.

anyone have any ideas or suggestions to temporarily "override" the CEL status.....some crazy trick that will confuse the ECU or what not

any help would be great!

 

does it idel rough or does the cel start flashing?


could be a simple coil.......or your icm could be bad

 

yeah its got a lumpy idle....

but im pretty sure the misfiring is due to the high lift cams in the engine

 

also.... VERY seldomly the CEL will flash a few times...but usually its just ON

 

bump

ive replaced spark plugs and coil packs...still CEL.. its only in cyl 2 and cyl 4 now (but that was BEFORE i did the maintenance)

 

Did you replace all of the coil packs? The 1.8 coil packs were very problematic, I just helped a buddy fix his B6 doing this.
A aftermarket cam will not cause a misfire. It will produce a lumpy/lopey idle because it makes the engine create less vacuum. A cam will not set of a CEL.
Switch around the number 2 coil to the number 1 cyl, and the 4 to the 3, and see if it moved the CEL to those cylinders. This will let you know these coils are bad.
Matt

 

i replaced all 4 yesterday

 

okay , replaced the ICM now as well...still misfiring...same codes

any other suggestions????

matt you are pretty sure its not the cams? i hope not, but i dont know what else to check now

 

I could not imagine how the cams would cause a misfire, but I cannot be 100% positive either. I have had cammed up 4 cyls, and never had issues.
How is the timing on the cams? I am not sure how it could affect anything, but worth a shot. I am not sure if Audis have Cam Angle Sensors so.....