I have a 95 325i Convertible with 91,000 miles. When driving under load the engine RPM cycles up and down about 2000 RPM. With very light throttle applied engine speed is constant and slowly increase with speed. Behaves like this at all speeds, hot or cold engine. This started all of a sudden about a month ago (didn't gradually get worse). No repairs have been attempted yet - any chance there is an easy fix to this?
Sounds like the MAF/AFM to me, you can try giving it a clean with carb cleaner, or you may have a vacuumm leak check your intake hose for cracks or splits, but I reckon its the MAF/AFM playing up, unplug it and see what happens.....
OK, I've cleaned the MAF 3 times and the problem is still there. Also, I borrowed a MAF from a friends car and mine drives the same. I looked carefully at the intake boot and there do not appear to be any cracks. Next, I guess I am going to change the intake hose and see if that fixes it. If anyone has any other suggestions let me know. Thanks
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