Iac valve

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

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.

6 Answers

72,235

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.

72,235

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.
72,235

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.

72,235

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.

Your Answer

Add photo

Related Questions

  • Iac valve 6 answers

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

    1994 Chevrolet Astro CL AWD Passenger Van Extended

    -

    Maintenance & Repair

  • OBD1 code 35 and code 83 2 answers

    I have a 1994 Chevy Astro 4.3L VIN W (CMFI) and I am get an OBD1 Trouble Code of 35 and 82. In looking up these trouble codes, it seems 35 deals with the Idle Air Control (IAC) and 82 is the Crank...

    1994 Chevrolet Astro Passenger Van Extended

    -

    Maintenance & Repair

  • Overheating after 10 min 2 answers

    Hello no thermostat change water pump,flushed. With t valve 3 times No way to turn heater on or fan(ripped out electrical) After 10 min i read 210 which it stays at for 5 min then i turn off Wate...

    1998 Chevrolet Astro Passenger Van Extended

    -

    Maintenance & Repair

  • Sticky Accelerator Pedal - How to clean throttle body 7 answers

    I have a Sticky Accelerator Pedal due to a sludged up throttle body. I can tell because it only sticks in the idle position (when in air intake valve is closed). I purchased some Valvoline throttle Bo...

    Chevrolet Astro

    -

    Maintenance & Repair

  • Should the radiator be change out if the temperature gauge indicating a little over 50% 2001 astro van 6 answers

    There is indication of rust in the radiator coolant system and the van recently ran hot due to a hole in vacuum bypass open heater valve. The valve was replaced

    2001 Chevrolet Astro

    -

    Maintenance & Repair

Astro

Looking for a Used Astro in your area?

CarGurus has 209 nationwide Astro listings starting at $2,995.

ZIP:

Search Chevrolet Astro Questions

Chevrolet Astro Experts

#1 celica_gt_pimp
celica_gt_pimp
Reputation 340
#2 Tom Demyan
Tom Demyan
Reputation 320
#3 John Saffrahn
John Saffrahn
Reputation 280
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
128 listings starting at $1,975
Used GMC Safari
109 listings starting at $1,995
Used Chevrolet Tahoe
584 Great Deals out of 32,918 listings starting at $1,500
Used Chevrolet Camaro
354 Great Deals out of 31,326 listings starting at $2,200
Used Chevrolet Suburban
279 Great Deals out of 19,273 listings starting at $1,999
Used Dodge Grand Caravan
150 Great Deals out of 25,006 listings starting at $2,000
Used Ford F-150
2,127 Great Deals out of 193,349 listings starting at $290
Used Chevrolet Blazer
1,168 listings starting at $1,495

Used Cars For Sale

2005 Chevrolet Astro For Sale
10 listings starting at $2,995
2004 Chevrolet Astro For Sale
14 listings starting at $4,995
2003 Chevrolet Astro For Sale
28 listings starting at $3,995
2001 Chevrolet Astro For Sale
19 listings starting at $5,999

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.