Originally Posted by citizen_insane
I've had an issue recently with my 2007 328i (stock) where when approaching a stop the Engine will suddenly drop in RPM and then go back up to idle speed when I clutch in. Example:
Slowing to stoplight in fourth. When RPM reaches 1500, I clutch in, RPM drops to 500, then increase immediately to 800-1000 (standard idle).
I wouldn't worry much except the other day it actually killed the engine. I have no warning lights on. At first I thought maybe the clutch was dragging a bit but the more I notice the issue, the less I think that's the problem. It seems to be more prevalent when the engine is warm. Any ideas?
Standard idle is ~600 without AC and ~700 with AC. If your fully warmed up idle is ~1000, that's a problem/symptom in itself.