1993 Mercury Cougar idle waaaaaay too high

1993 MERCURY COUGAR
3.8L • V6 • RWD • AUTOMATIC
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MECHMAN1003
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  • 1 POST
I have had this cougar for five years now and she has been a great car until three weeks ago. I was driving to work and all of a sudden it began accelerating on its own. I could hardly get it to stop so i popped it into neutral. The motor then revved up to almost 3000 rpms. I have no cel or studdering or any other mechanical issues to speak of just high revving. I have replaced tps maf and the egr valve nothing has helped. This issue is making it dangerous to drive and is wearing the brakes excessively. Alot of the time I can smell the brakes burning when stopping at lights. Plz help me.
Jul 3, 2014 at 4:15 AM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
Assuming you first eliminated mechanical issues with the throttle body sticking open, you would have to have a major air leak somewhere. The engine has to be receiving unmetered air for that to happen.
Jul 3, 2014 at 5:21 AM