2004 330i with 170,000 miles had misfire codes which were caused by the catalytic converter. Recently bought the car with a known SES light for lean codes. Fixed those, then had the below adventure. Problem solved thanks to other threads on here. These two in particular...

So I've had a P0305 for a couple years now. It only occurs on initial cold start. The computer is shutting down Cylinder 5, which I've verified by unplugging the coil to Cyl 5 and there is no change to the already rough idle, however there is dramatic change if I unplug any other coils. The...

Ok, here's my history. Got a 2000 328i a month ago. Drove it all the way back to Indiana from Texas and it drove great. No codes, so I thought. A few days later, I noticed it was idling rough until it got to temperature. It would be at 700 rpm's and then almost stall as it would drop to...