What would make the car idle high?

2000 CHEVROLET MALIBU
100,000 MILES
Avatar
DRIBBLER1
  • MEMBER
  • 27 POSTS
It idles at 2000 rpms or more and when you turn on the air it goes up to 4000 rpms. It also has fast acceleration also
Aug 29, 2011 at 8:04 PM
Advertisement
Avatar
CARADIODOC
  • CERTIFIED EXPERT
  • 34,306 POSTS
I'd be suspicious of a vacuum leak. When the engine is still cold and running, use a spray bottle to spray water over the intake manifold gaskets and vacuum hoses. Watch for places the water gets sucked in or that makes the engine slow down.
Aug 29, 2011 at 8:50 PM