C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

IAC REMOVAL

Old Sep 25, 2002 | 09:59 PM
  #1  
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From: hamilton ontario
Default IAC REMOVAL

I was thinking of cleaning my iac i have a rough idle .
Is it hard to remove
any help would be appreciated

thanks MJFox
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Old Sep 25, 2002 | 11:05 PM
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Default Re: IAC REMOVAL (mjfox)

It is not hard to remove the IAC. Just be sure you disconnect the battery before you do anything. Use Intake manaifold cleaner on it and clean your throttle body at the same time.

While you are at it, why not do the throttle body bypass of the coolant :cheers:

After reinstalling the IAC you should adjust the TPS. There is a specific procedure to do this properly located in tech tips.
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Old Sep 26, 2002 | 01:34 PM
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Default Re: IAC REMOVAL (85vet)

I think the manual cautions against using any type of solvents on the IAC. I think it has to do with solvent getting into the inner workings. I'd just scrape the crud off the end and wipe off the residue with a rag.

.....but that's me :seeya
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Old Sep 27, 2002 | 08:46 PM
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From: Punta Gorda, FL
Default Re: IAC REMOVAL (mjfox)

I couldn't get at the IAC with a wrench or a pliers. It's too tight down there and it's a huge nut. Took the throttle body off and cleaned up the whole thing. It was a piece of cake. You'll need a gasket set. Got at Auto Zone for $5. Have better performance all around, and a little higher, smoother idle.
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Old Sep 28, 2002 | 01:15 AM
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Default Re: IAC REMOVAL (Ron78Z&85Vette)

I think the manual cautions against using any type of solvents on the IAC. I think it has to do with solvent getting into the inner workings. I'd just scrape the crud off the end and wipe off the residue with a rag.

.....but that's me :seeya
The manual recommends that you do not emerse the IAC in fluids!
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Old Sep 28, 2002 | 11:19 AM
  #6  
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Default Re: IAC REMOVAL (85vet)

Your bio says you have a 92. For that year there is no adjustment for the TPS as with earlier models. Don't use cleaning agents on the IAC. Just carefully clean it with rags and check the pintle deapth when reinstalling (1- 1/8" ). You can use throttle body cleaner to clean out it's location in the throttle body itself.
Good luck.
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Old Sep 28, 2002 | 11:24 AM
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Default Re: IAC REMOVAL (lspalding)

I used an 1 1/4 thin wall deep socket probably a one use tool :cheers:
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