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Message: <blockquote data-quote="BMW2007" data-source="post: 22964" data-attributes="member: 4659"><p>Dear Sifu & Bro, My e36 328i is having rough idling when cold start and the car is rocking like washing machine with RPM fluctuate up and down. However the shaking will be gone and stabilize immediately after accelerate rev up the RPM to 1.5~2K then release immediately. Car running smooth without rough when shifting to D, however noticed that the rpm will be "rebound" back to 1.5K when the car slows down to 1K without accelerate. What cause the rpm rebound automatically even without accelerate? It will repeats 3 times before rpm can be really came down to 800 mark while driving in D.Appreciate your advise, thanks.</p></blockquote><p></p>