Q I have an 85 325e that wants to “RPM hunt” during cold engine warmups. Can you help me ?
Hans

A A hunting idle, one that continuously goes up and down, is typically due to either a lean fuel mixture or a faulty idle control system. A lean mixture can be caused by a number of

Continue reading 1985 325e (E30) RPM “Hunts” (Fluctuates) Upon Start Up

Q My 1991 535i runs great except at idle. I replaced the air flow meter 20k miles ago (for another reason) with a rebuilt unit. Any ideas on this issue, including how to test for whatever you suspect?
John C.

A What to do about rough idling is one of the most common questions we get. Typically,

Continue reading 91 535i (E34) Rough Idle