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Engine Vibrates at Idle 700 1989

posted by  Jim Holst on  Mon Nov 10 06:07 CST 2003
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last visit: Tue Jan 4 11:05 CST 2011
[RELATED]

Besides the motor mounts, check for vacuum leaks particularly in the hose between the AMM and the throttle body. You could also have a small vacuum hose which has split such as the hose from the intake manifold to the fuel pressure regulator. If that hose to the regulator has spit, the engine is running very rich and may account for the roughness.

Since this hasppened suddenly, I'd look a things like the vacuum leak and possibly bad ignition wires.






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