WHY DOES ENGINE STUTTER WHEN I LET OFF GAS AND HIT BRAKES?

  • Tiny
  • hndrxjimmy
  • 2004 Chevrolet Colorado
  • 16,000 miles

I have an 04 Colorado with a 3.5 litter. While driving the and I let off the gas my rpms drop to below 500 and it stutters. It also acts up when I hit the brake. I changed the spark plugs to see if this helped out but it didn't. I have also replaced the cables coming from the battery. What could the problem or diffrent problems be? Thanks

Tuesday, January 17th, 2012 AT 1:14 AM

2 Answers

  • Tiny
  • PROTECH1980
  • Expert
  • 928 posts

Is there a CEL (check eingine light on), if so, have scanned and diagnose that first, Another thought would be a dirty throttle bore that needs to be cleaned with approved cleaner and a old toothbrush to address your idle issue.

Was this
answer
helpful?
Yes
No
Tuesday, January 17th, 2012 AT 1:22 AM
  • Tiny
  • hndrxjimmy
  • Member

I do have a CEL on. I had it checked. The problem with the CEL is a vacum leak. The problem with the engine acting up was before the CEL came on. Thanks for your help. I will check into the dirty throttle bore.

Was this
answer
helpful?
Yes
No
Tuesday, January 17th, 2012 AT 7:36 PM

Please login or register to post a reply.

Similar Questions