ENGINE REVS UP AND DOWN ON ITS OWN WHILE IN PARK

  • Tiny
  • spokster69
  • 1995 GMC Jimmy
  • 14,600 miles

HELP! I have and idling issue with a 95 gmc jimmy 4.3 liter v 6 2wd vortec not all the time mostly when the engines hot!Today errtacic engine idle rpm up and down until engine turned off. What should I do first? Replace EGR, IAC?

Monday, January 30th, 2012 AT 6:25 PM

2 Answers

  • Tiny
  • hmac300
  • Expert
  • 42,919 posts

Nope try choke cleaner on teh throttle plate and iac valve. Then drive it and see if it does the same. Then check fuel pressure and for vacuum leaks.

Was this
answer
helpful?
Yes
No
Monday, January 30th, 2012 AT 8:39 PM
  • Tiny
  • spokster69
  • Member

Thanks for your input worked out well.

Was this
answer
helpful?
Yes
No
Monday, January 30th, 2012 AT 8:59 PM

Please login or register to post a reply.

Similar Questions