2002 Mercury Marquis Stalling

2002 MERCURY MARQUIS
41,000 MILES • V8 • 2WD • AUTOMATIC
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ARROWHEADINTL
  • MEMBER
  • 1 POST
My car starts fine, but will not idle. As long as the gas pedal is depresed it runs fine. As soon as you let off the pedal it stalls.
None of the check engine lites come on.
I'm wondering if it is the ISC idle control motor
Aug 23, 2010 at 11:00 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
Aug 23, 2010 at 11:24 AM
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