idle speed erratic

Avatar
SCHIRJO
  • MEMBER
  • 2 POSTS
2001 Honda Accord EX V6 67000 miles:

Engine running in Park or Neutral, the idle speed fluctuates between normal and higher revs back and forth, normal - high - normal - high RPMs

Putting the gear in reverse or drive, it idles normally.

I already checked vacuum lines and the coolant level is normal. I did probe the EGR valve by reading my Haynes manual, and that seems to be NOT working (no continuity between prongs 1 & 2 or 1 & 3). I was going to replace the EGR valve but i am not sure if that is really the problem.

Any insight that could be provided would be appreciated.

Joe
Jul 15, 2007 at 2:15 PM
Avatar
BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
Does it do the surging whether the engine is warm or cold? Don't forget that even if the coolant is in the full area there can still be air in the system. The IAC valve could be in need of cleaning.
Jul 17, 2007 at 9:42 AM
Avatar
SCHIRJO
  • MEMBER
  • 2 POSTS
I replaced the EGR valve and the problem is gone.

Joe
Jul 17, 2007 at 1:01 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle