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When the car is idling or being driven, the.
1992 MERCURY MARQUIS
When the car is idling or being driven, the engine will rev for a minute then go back to idle or to the normal acceleration level. What causes this?
Saturday, November 10th, 2012 AT 3:51 PM
Scan for codes and check fuelpressure, clean throttle plate with choke cleaner on both sides. Then check for a vacuum leak
Saturday, November 10th, 2012 AT 4:08 PM
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