How do you adjust fast idle on motor? It has started to go up to almost 2800 RPM. Very fast

Tiny
MIKE HALEY1
  • MEMBER
  • 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 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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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