how do i adjust my iac?

[typhoon-crazy]

im looking to adjust my idle air control valve and i need to know how. i know it has something to do with check the volts on it or something. thanks in advance

 

[Sy769]

You don't have to readjust the TPS if that is what you are referring to. Their is no adjustment on syty's

 

[typhoon-crazy]

im pretty sure now all i need to do is remove the iac and clean it. how do i get the iac off?

 

[smeagol]

It completely unscrews. Pretty big wrench if I remember correctly, but not super tight.

Best bet is to remove the intercooler, then the throttle body. It is directly on the lower portion of the throttle body. Once you have it off the truck, the IAC should come off easily. When cleaning - be careful with the pintle, or you'll F it up. Clean the throttle body up, as well the intake etc.

Get a new TB gasket, you might destroy yours when you remove the throttle body. It's an easy to find gasket at most parts stores.

 

[typhoon-crazy]

i know you can adjust a screw that is on the iac but how do i know if im doing it right if i dont have a datamaster?

 

[smeagol]

Don't adjust your IAC

You shouldn't have to adjust your throttle body stop.



I wouldn't do much of anything on these trucks without a scantool. like installing windows without a monitor 8)

 

[Sy769]

I wouldn't do much of anything on these trucks without a scantool. like installing windows without a monitor 8)

:rofl: BG sometimes you really have a way of putting things in perspective
You should add that to your sig.

 

[JustBeachin]

What makes you think you need to adjust your IAC? What are your symptoms?

 

[Falco]

Yep, you shouldn't adjust your IAC valve. The only thing you can do is to check that the distance between end of the valve (the cone) and the IAC's housng (end of the thread) is no greater than 28mm. If it is, you should sligthly push it back...

HTH,

 

[typhoon-crazy]

my symptoms are. shifting in and out of gear the car stubles a little. and when im coming to a stop my car wants to die. it doesnt but it gets pretty damn close.

 

[Flyin Ryan]

my symptoms are. shifting in and out of gear the car stubles a little. and when im coming to a stop my car wants to die. it doesnt but it gets pretty damn close.

My truck had the same problems that you listed ... but it just needed a tune up which solved it all for me. Have you tuned the truck up lately?

 

[smeagol]

i traded in my chevy for an iac-ack-ack-ack-ack-ack

it's ignition


(you oughta know by now)

 

[GM TURBO]

Vacuum.

 

[Falco]

Similar symptoms were caused by a vacuum leak in my case. Check your vacuum lines. Are you still using the original ones? If yes, replace them with some kinda quality silicon lines.

HTH,

 

[sytyfreak]

Wheres the IAC valve located?? How does it look like?? Sounds stupid, but I'm pretty sure my truck has a custom work done to it. If anybody can post a picture or give me any details I'll appreciate it.

 

[typhoon-crazy]

my ty only does that wierd idle thing after it has warmed up. when the truck is warming up it runs fine.

 

[smeagol]

Wheres the IAC valve located?? How does it look like?? Sounds stupid, but I'm pretty sure my truck has a custom work done to it. If anybody can post a picture or give me any details I'll appreciate it.

read this




It completely unscrews. Pretty big wrench if I remember correctly, but not super tight.

Best bet is to remove the intercooler, then the throttle body. It is directly on the lower portion of the throttle body. Once you have it off the truck, the IAC should come off easily. When cleaning - be careful with the pintle, or you'll F it up. Clean the throttle body up, as well the intake etc.

Get a new TB gasket, you might destroy yours when you remove the throttle body. It's an easy to find gasket at most parts stores.

 

[Rick Krupa]

Wheres the IAC valve located?? How does it look like?? Sounds stupid, but I'm pretty sure my truck has a custom work done to it. If anybody can post a picture or give me any details I'll appreciate it.

The IAC is located on the throttle body pointing towards the distributor. Just unplug it and it comes right off with a large deep wall socket in less than 2-minutes without removing anything.
I had my upper intake, throttle body and IC cleaned before so if your your having issues, I would suggest doing what Brian suggested and remove the above items to clean and replace with new gaskets.

 

[spooldup]

here's the felpro number for the tb gasket. Felpro, 60826, its for a Vette 350. Me and nickny spent a day at the stupid parts store until they got it right.

 

[typhoon-crazy]

so at the back of the throttle body underneath just unplug the iac and with a socket you take off 1 bolt and it will slide out? then once i slide it out clean it with carb cleaner...