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International Automotive Technicians Network
Re: 1995 BMW 740iL Surge & Smoke at Idle
Posted to Technical Discussion Forum on 9/13/2002 5 Replies

THE PROBLEM WITH THIS VEHICLE HAD TO BE DIAGNOSED ON MY OWN. THE PROBLEM WAS THE CRANKCASE VENTILATION VALVE ON THE REAR OF THE INTAKE MANIFOLD. THE DIAPHRAGM HAD RUPTURED ALLOWING A LARGE VACUUM LEAK AND ALSO ALLOWED AN ACCUMULATION OF OIL TO DUMP INTO #7 & #... Login to read more.

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