2000 Chevrolet Express idles very hig. Running rich

ROBGARTH1

MEMBER
2000 CHEVROLET EXPRESS
4.3L
6 CYL
2WD
AUTOMATIC
200,000 MILES

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? !

3 Replies

HMAC300

MECHANIC
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.

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Wednesday, February 5th, 2014 AT 4:55 PM

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

Was this

answer

helpful?

Yes

No

Wednesday, February 5th, 2014 AT 5:49 PM

HMAC300

MECHANIC
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.

Was this

answer

helpful?

Yes

No

Thursday, February 6th, 2014 AT 6:13 AM