Mechanical or wiring problem?

Asked by May 14, 2013 at 08:24 AM about the 2003 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

My grand marquis has done this several times this month. I start the car and it starts fine,
engine running, I drop it into gear and engine shuts off and brake and check engine light
come on. This repeats several times . I had it towed once and when we got to shop car
worked fine- showed no problem. Another time I let it sit for 2hours and everything was
fine.

1 Answer

29,815

Clean the throttle body and check the idle air control valve to see if it needs cleaning or maybe replaced. start there and see if that helps any.

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