2000 CHEVY BLAZER 4X4 SPARATIC HIGH RPM

  • Tiny
  • valeriestern
  • 2000 Chevrolet Blazer
  • 120,000 miles

My 2000 Chevy blazer 4x4 V6 revs at about 2500RPM when I start it and then SLOWLY drops to around 1500RPM which is still not normal(should be 1000RPM in Park/Nuetral and around 600-800RPM in Reverse/Drive). When I put it in Drive it goes all the way back up to 2500RPM and when I come to a stop it wants to stay at the same RPM until I am stopped and then SLOWLY goes down to about 1500RPM. I have replaced the Throttle Possition Sensor; Idle Control Valve and PCV valve. I have cleaned the entire Throttle Body and cleared it of all Carbon that could cause a sticky throttle. I'm at a loss as to what it could be. Since a shop will charge me an arm and a leg I would like to fix it myself. Any ideas?

Monday, August 15th, 2011 AT 1:34 AM

1 Answer

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Check for vacuum leaks, check to make sure the IAC is getting power and working properly.

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Tuesday, September 6th, 2011 AT 4:38 AM

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