I have a 1997 mercury grand marquee idles high on cold start and warm start replaced idle zircon troll but still does the same thing help please

Asked by GuruY5G7H Feb 24, 2018 at 11:53 AM about the 1997 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

1 Answer

180

They have an issue with the throttle body getting gummed up. Try cleaning it out, but make sure you only use throttle body cleaner not carb cleaner. Also, make sure you don't get it on your TPS or throttle body motor. Watch a video on proper cleaning it and retraining your pcm.

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