1997 Chevy Monte Carlo High Idle

1997 CHEVROLET MONTE CARLO
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SHAREKA
  • MEMBER
  • 1 POST
1997 Chevy Monte Carlo 135000 miles
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Sometimes my car has an low idle, but at times it idles real high. I believe the RPM goes from 100 to 400 and then back down fast. Sometimes when it is in park it just idles high on its on. I was told that it could be the throttle position sensor. Not sure what I should do.
Jun 18, 2008 at 12:41 AM
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RHALL77
  • ✓Experienced Mechanic
  • 3,361 POSTS
also check for vaccum leaks. that can also cause idle to go up and down.
Jun 18, 2008 at 12:52 AM
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