Iac valve

Asked by Feb 01, 2016 at 05:56 PM about the 1994 Chevrolet Astro CL Extended AWD

Question type: Maintenance & Repair

I changed iac valve because I got the code and had
a rough idle. Now it idles high. Super high when in
park.

7 Answers

76,265

That port that you pulled out the old IAC would have needed to be cleaned out good. That port is a major source of vacuum, so the IAC gasket area would have to be supper clean so it can make a seal. I like lubing the o-rings for easier installation and to help seal good. Even if you use your spit for lube on the o-rings. I would also check the throttle body gasket.

1 of 1 people found this helpful.

Yea I just unscrewed the old n put in new. Any tips for cleaning and do u think I've messed up the iac. Thank you.

76,265

Actually the best thing to do is to take the throttle body right off to clean out that port, and all the rest of the throttle body, You use a spray can of carburetor cleaner, and it is nice to have an air hose for blowing it off. But check the throttle body base gasket as they will wear with time and cause a vacuum leak. The IAC I think should be ok.

1 of 1 people found this helpful.
76,265

I was looking at a picture of the IAC and how it seals, make sure the threads are cleaned good on the throttle body, and you should put some thread sealer on the threads of the IAC when you put it back in.

1 of 1 people found this helpful.

It has a red liner on threads not sure if it's b damaged once unscrewed. Wat would b ur thoughts of using pipe dope on threads. My old one didn't even have the gasket. Lol. This high idle threw me a curve ball for sure.

76,265

Ya anything to seal the treads, even Teflon tape. If you use pipe dope, use it sparingly, just enough to fill in the treads, You do not want any getting anywhere else.

1 of 1 people found this helpful.

which car do u have ?

Your Answer

Astro

Looking for a Used Astro in your area?

CarGurus has 205 nationwide Astro listings starting at $1,495.

ZIP:

Chevrolet Astro Experts

  • #1
    celica_gt_pimp
    Reputation
    340
  • #2
    Tom Demyan
    Reputation
    320
  • #3
    John Saffrahn
    Reputation
    290
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
127 listings starting at $1,775
Used GMC Safari
105 listings
Used Chevrolet Tahoe
823 Great Deals out of 41,738 listings starting at $1,987
Used Chevrolet Suburban
489 Great Deals out of 24,004 listings starting at $1,799
Used Chevrolet Camaro
446 Great Deals out of 31,345 listings starting at $1,450
Used Toyota Tacoma
705 Great Deals out of 45,170 listings starting at $1,000
Used Ford F-150
3,207 Great Deals out of 219,867 listings starting at $1,200
Used Honda Odyssey
430 Great Deals out of 30,974 listings starting at $1,490

Used Cars For Sale

2005 Chevrolet Astro For Sale
14 listings starting at $2,799
2004 Chevrolet Astro For Sale
19 listings starting at $3,995
2003 Chevrolet Astro For Sale
35 listings starting at $2,300
2002 Chevrolet Astro For Sale
23 listings starting at $1,495
2001 Chevrolet Astro For Sale
18 listings starting at $1,595

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.