IAC Valve?

[92BlkTy]

Got code 35 on datamaster. wondering if anyone has a part number for a new IAC valve, and if there are any writeups. getting tired of driving the truck 2 footed. :x

 

[SY2932]

From http://www.sytyauthority.net/ :wink: IAC Valve #17112193. HTH's

 

[92BlkTy]

Doh! should have checked there :banghead:

Thanks!

 

[dgoodhue]

You may want to try clean it with carb cleaner, they get gummed up with carbon deposits.

 

[92BlkTy]

Anyone got pics of one? ive never had to deal with one before so i dont know what im cleaning

 

[kwick6]

http://www.detroitturbo.com/gallery/album04/iac

 

[92BlkTy]

awesome! i assume its in the intake manifold?

maybe running some BG fuel system cleaner would do the trick?

 

[dgoodhue]

Its under the TB. Buy some new TB gaskets and clean away with Carb cleaner. On higher mileage truck, the passages can be so cloggeed that a new IAC doesn't even fix the problem. Fuel cleaner won't do the trick for the IAC...

 

[kwick6]

Look under the TB, on the back near the distributor. Unplug the electrical harness, and I used a 32mm? or so sized socket to get mine out.

Didn't take long, and I just figured I'd replace mine since my engine has 140k on it. It really changed the idle quality and took away the surges I was getting when putting the truck into park when it was hot.

If you've never done top engine cleaner, I'd recommend you do that when you have time. It works really well at cleaning out the carbon deposit on the intake.

 

[Merk]

There is apparently a procedure to properly install and "set" the IAC motor.

Anyone know it?

 

[dgoodhue]

There is apparently a procedure to properly install and "set" the IAC motor.

The procedure for setting the IAC in a L98 corvette, is really for setting the set screw that adjust the throttle plates on the TB (minimum air). It basically it to jumper the ALDL such that it extanded the IAC fully and then you disconnect the IAC connector, so that it stay in that extended position.

Someone asked me a question about this is Typhoon, I looked in the service manual and couldn't find any procedure other than it is factory preset.

 

[kwick6]

There is apparently a procedure to properly install and "set" the IAC motor.

Anyone know it?

1. Jumper A & B terminal on the ALDL
2. Turn key to "on" (do NOT start engine)
3. Go out and listen for IAC "growling" noise. That means its bottomed out. Disconnect the electrical connector.
4. Start engine and idle should be 650 rpm. If its not 650, adjust the idle stop screw until it is. If you've never adjusted it, a metal cap needs to be removed on the TB to access this screw.
5. Turn off engine, reconnect electrical connector on IAC.
6. Start engine, and put the trans in gear......... the idle should quickly go to that set rpm.

 

[Loeryder]

Those may help as well.
Via the SyTy supplement.
And now added to my tech gallery HERE