Re: VW GOLF 1.8T (AUM) - ROUGH IDLE/LEAN RUNNING
Matthew Booth
Have you checked the one way valve in the crankcase breather pipe? The plastic disc in it breaks. Often missed and will not cause a external leak. Does however cause rough idle and misfire at idle, sometimes also logs pressure loss fault code. Located at the front of the engine - look for a wide pipe joining a slightly narrower pipe. Matt
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