repairs not working correctly

Asked by Jan 08, 2016 at 09:00 PM about the 1994 Chevrolet C/K 1500 WT LB 4WD

Question type: Maintenance & Repair

I was doing some maintenance  to my 1994 chevy cheyenne c
1500 truck and was cleaning the harness plug on IAC valve and
it fell apart. I bought a replacement, installed it and the motor is
idling high. I replaced the IAC valve and PCV valve and it
continues to idle really high and fast. Cannot figure out the
problem. Is it a vacuum line I'm missing or is the computer brain
not sending the right command?

2 Answers

77,985

I believe on an OBD I vehicle you have to set the pintle length on the IAC to match the old one before installation. But since it was idling high after the plug replacement but before the IAC replacement I'd say the wires at the new IAC connection are mixed up. Unplug the IAC and start the engine. If it then idles low, there's the problem. HTH. -Jim

21,515

Do not mess with the iac, you cannot set anything on it prior to installation. I agree, sounds like the wires went spliced together right

1 people found this helpful.

Your Answer

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    4,170
  • #2
    John Saffrahn
    Reputation
    2,720
  • #3
    Rowefast
    Reputation
    2,340
View All

Related Models For Sale

Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used Chevrolet C/K 2500
192 listings starting at $3,950
Used Dodge Ram 1500
316 Great Deals out of 9,549 listings starting at $800
Used Chevrolet C/K 3500
179 listings starting at $4,895
Used Chevrolet Tahoe
528 Great Deals out of 36,655 listings starting at $1,375
Used Chevrolet Camaro
224 Great Deals out of 28,922 listings starting at $3,900
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995

Used Cars For Sale

1998 Chevrolet C/K 1500 For Sale
146 listings starting at $3,995
1996 Chevrolet C/K 1500 For Sale
77 listings starting at $4,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.