When stopped or idling, car begins to surge after it appears to quit running?

200

Asked by May 27, 2013 at 08:03 PM about the 2004 Mercury Grand Marquis LS Ultimate

Question type: Maintenance & Repair

2 Answers

27,015

check for vacuum leaks first.

925

also have it taken to your nearest dealer for a check on the computer control unit. So they can diagnose if is vacume or idle settings. May be something as simple as a quick turn of the idle control sensor.

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