Engine Performance problem
1995 Mercedes Benz 220cdi 4 cyl Two Wheel Drive Automatic
95 c220 will not idle after it warms up. Cold idle 1000rpms then drops to 500 rpms and will not stay on.I have replaced mass air flow sensor, fuel filter and have checked the gasoline regulator.I also unplugged a vaccum hose and the car idle and ran fine. The hose is on top of the intake and the vaccum runs under the windshield washer fluid container. When plugged the engine sounds like there is not enough air getting to it. Any ideas?