Search the Community
Showing results for tags 'rough idle'.
Found 2 results
My 04 545i is now running real rough. Started with just the odd what sounded like a miss fire when cold a couple a weeks ago and would soon come right and idle smoothly. Now it's constantly running rough, not 100% if it's a misfire, or running on 7 or what. I have tried cleaning the mass airflow sensor as one thing I might be able to do but made no difference. Any thoughts or suggestions greatly appreciated. I'm in Dunedin, if anyone here would be willing to help, yarn or suggest someone who may be able to help that would be great. I have just bought a K+DCAN cable to have a crack at trying to work out what might be wrong, but need to work out how to use that first too. Cheers Sam
Hi , my first post and question. My e24 rough idles after its warmed up and been driven. eg at traffic lights the car almost stalls. The idle ramps up and down, and then stalls eventually. There is also a mechanical whirring noise from the engine which occurs at the same time. I think ive narrowed it down, my take is the bearing in the alternator is slowly seizing up, and putting load on the engine? i tested it by taking of the alternator / water pump belt and the whirring stopped, and the idle was fine again. So would a problem with the alternator (most likely not water pump?) cause this rough idle and stalling?