HOW DO YOU ADJUST FAST IDLE ON MOTOR? IT HAS STARTED TO GO UP TO ALMOST 2800 RPM. VERY FAST

  • Tiny
  • Mike Haley1
  • 1988 Mazda 929
  • 16,000 miles

My car has started to fast idle when cold/first started from 1200 rpm to almost 2800 rpm. How do I resolve?

Tuesday, January 24th, 2012 AT 1:58 AM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,550 posts

Sounds like you have a vacuum leak. A smoke test would confirm. Make sure the throttle body is not sticking. Make sure the idle air control motor is functioning as well.

Roy

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Tuesday, January 24th, 2012 AT 3:56 AM

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