2000 Chevrolet Express idles very hig. Running rich

2000 CHEVROLET EXPRESS
200,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
Avatar
ROBGARTH1
  • MEMBER
  • 2 POSTS
Van was running fine in the morning. Later that day the van started idling very high and has continued for a week now. I have cleaned everything I can(throttle body.etc) I have replaced the IAC. Did no good. No code is being sent. I understand it could be a number of things. Vacuum leaks, egr valve, brake booster. I have found no leaks. How do I fix the problem without going through process of elimination? ?!!
Feb 5, 2014 at 4:43 PM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
you wave a magic wand and it all stops lol. check fuelpressure with a gauge auto parts rent them should be 60-66 psi. then check for vacuum hoses off, air duct work with holes in it or not on correctly then scan for codes. you have to do process of elimination to find out what the problem is.....
Feb 5, 2014 at 4:55 PM
Avatar
ROBGARTH1
  • MEMBER
  • 2 POSTS
Well I loaned my wand out and never got it back! I understand I do need to go through process of elimination. What I should have been clearer on was trying not to buy all the valves and parts by doing POE.. I have checked all hoses. No leaks. Thanks
Feb 5, 2014 at 5:49 PM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
that is why you scan for codes and check fuelpressure first to see if anything come up with either so you don't waste time buying parts and replacing them blindly to try to fix it.
Feb 6, 2014 at 6:13 AM