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Message: <blockquote data-quote="rayncc" data-source="post: 19057" data-attributes="member: 14823"><p>Hi all,Was driving my E30 yesterday when suddenly the engine encountered stuttering problem with following symptoms :-1. Engine will simply dies off in free gear. Can't even idle2. Engine extremely difficult to rev; feels very heavy3. In order to drive car, have to use low gears (i.e. 1, 2 or at most 3 depending on speed) to literally drag the car to move because the revs refuse to climb hence totally no power. 4. When stomp the pedal to rev the engine, plenty of black smoke as if the engine running very richHowever after constant and forceful reving of the engine, the problem disappears. Upon checking, the flap inside the AFM appears clean and have good clearance in its movement except the throttle body which has fresh lubes which show signs of overflow of engine oil.Even now without the stuttering problems, i feels that the engine sometimes experience 'flat spot'....for example when driving in 5th gear at 3k rpm, when step on the pedal the engine sorts of hesitates a while before responding. Normally the car will just pick up speed instantly.Can some sifu out there care to advise what could the problem be? Thanks.....</p></blockquote><p></p>