Mechanics

ROUGH IDLE MERC

1999 Mercury Villager • 6 cylinder AWD Automatic • 128,000 miles

Mercury Villager has 128000 miles. I have had distributor replaced, spark plugs replaced (expensive ones), throttle body cleaned, vacum leak sealed (reconnected), air filter replaced. When I am at a stop and engine is running, it has a rough idle, almost like a "shudder". It does not act like it is going to die or cut-off. When I put the gear in park it does not do this. Shifts gears fine (transmission is smooth), very good gas mileage. Only the slightest of hesitation when pressing on the gas from a stopped position.
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Fool4no1
August 23, 2011.




Start with a compression test. You have done the plugs, what about the wires. Make sure there is no other vacuum leaks. Beyond that, you may need help from a shop to track it down.

Roy

ASEMaster6371
Aug 23, 2011.


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