On my '83 300D:In cold weather, engine dies down and stops very slowly when key is removed. In warm weather, engine stops normally. If I rapidly turn th key several times, vacuum begins to build and engine stops quicker. Also, when this happens in cold weather, entire vacuum system loses vacuum. What could be causing this; vacuum shut off valve? Vacuum switch on ignition lock? Vacuum pump? Other?
Thanks. Gerry Archer '83 240D and 300D
