Hello everyone,
My girlfriend recently bought a 1997 528i and inherited a rough cold start idle. I have cleaned the ICV, throttle body, and used some BG44K to help clean the injectors, but it is still there. I have wondered if the TPS is out of adjustment down at the bottom of travel since if you apply a little throttle pressure upon startup and hold it so the startup idle is a little higher for 10 sec or so then the true idle smooths out so that the car doesn't stumble or stall.
Any advice is greatly appreciated.
Many thanks, Seth