HELP Mk1 225 BEA Misfire at idle ONLY **VIDEO**
Was driving to walgreens when my car randomly started misfiring at the end of the trip. At first there was no CEL and it had multiple misfires for sure but any time I touched the throttle and the RPM's raised it ran like a top. Its been doing that ever since then.
I drove it home and a CEL finally showed, pulling the code i got 300-303 which is random misfires. Spark plugs were just changed and at correct gap.
I took out one spark plug and it looked fine along with the cylinder hole it came from. I unplugged the MAF and nothing changed. Replugged that and unplugged the SAI pump and that also changed nothing, maybe ran a tiny bit better but definitely still misfiring.
This misfire started very randomly while I wasn't putting the motor under much load so I believe it is a sensor or electrical issue. I have a bentley manual and I've followed majority of the SAI/N249/N112/Combi hoses and theres no major cracks or anything.
My cam seals appear to be leaking a little, and I noticed the ground wire and coil pack #1 wire has split insulation and somewhat exposed wire. I wasn't worried about the ground, but would the open wire cause resistance issues with the coil pack or packs causing a misfire only at idle or am I going in the completely wrong direction and this is a vacuum problem?
The car drives fine when it has fuel and air from pressing the pedal, but as soon as I let off it sounds like it does in the video.
I drove it home and a CEL finally showed, pulling the code i got 300-303 which is random misfires. Spark plugs were just changed and at correct gap.
I took out one spark plug and it looked fine along with the cylinder hole it came from. I unplugged the MAF and nothing changed. Replugged that and unplugged the SAI pump and that also changed nothing, maybe ran a tiny bit better but definitely still misfiring.
This misfire started very randomly while I wasn't putting the motor under much load so I believe it is a sensor or electrical issue. I have a bentley manual and I've followed majority of the SAI/N249/N112/Combi hoses and theres no major cracks or anything.
My cam seals appear to be leaking a little, and I noticed the ground wire and coil pack #1 wire has split insulation and somewhat exposed wire. I wasn't worried about the ground, but would the open wire cause resistance issues with the coil pack or packs causing a misfire only at idle or am I going in the completely wrong direction and this is a vacuum problem?
The car drives fine when it has fuel and air from pressing the pedal, but as soon as I let off it sounds like it does in the video.
Replaced all 4 coil packs and still runs the same. Testing resistance and voltage at coil pack connectors tonight. Audi forums suck because I always expect someone to be able to help me but I'm always left with no reply. Do all you losers take your car to the stealership as soon as the CEL comes on? I know you guys know about this ****, someone has had to have the same problem before..
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Russ Heinrichs
B5 Models
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Aug 18, 2021 12:39 PM



