I have an intermittent issue that is driving me to my wits end, making me want to get rid of my M5. I've exhausted all venues of troubleshooting the issue, and am coming to the collective wisdom of the board for assistance. See my sig for all the mods I've done to the car.
Symptoms:
A crank sensor error shows up occasionally in shadow memory within PA-Soft, and I've swapped the crank sensor out with a known good sensor. Issue persists.
A possibility I am considering is a bent tooth or other defect on my UUC flywheel, but need clear detailed pictures on what I may be looking for.
Any new paths or troubleshooting or guidance would be greatly appreciated.
Symptoms:
Intermittent rough idling, then stumbling/misfire up until 4000 RPMs. After 4000 RPMs it's like nothing is wrong. No SES lights are triggered or codes stored when behavior is present.
Steps to troubleshoot:
Crank Sensor Replaced
All 4 CPS replaced
MAFs replaced
O2 sensors replaced.
Coils checked
Plugs replaced
Checked headers for proper fitment and cracks
DME replaced and recoded
I've ran DIS v57 multiple times, as well as Peake and PA-Soft 1.4.0.All 4 CPS replaced
MAFs replaced
O2 sensors replaced.
Coils checked
Plugs replaced
Checked headers for proper fitment and cracks
DME replaced and recoded
A crank sensor error shows up occasionally in shadow memory within PA-Soft, and I've swapped the crank sensor out with a known good sensor. Issue persists.
A possibility I am considering is a bent tooth or other defect on my UUC flywheel, but need clear detailed pictures on what I may be looking for.
Any new paths or troubleshooting or guidance would be greatly appreciated.