Okay so in this picture the iac is the plug in to the left of the tb correct? And to clean will carb cleaner work?

And I should apply carb cleaner to my rag or what ever correct? And not to the actual body?

 

Carb cleaner should work, and you can directly spray as long as you blow it clean with a high pressure air gun.

 

Don't have a gun so should I just apply to my rag with a light amount?

And was I correct with the location of the iac?

 

Yes that is the I.A.C. closest to the valve cover

 

ill spary alittle on the throttle plate and scrub it with an old toothbrush.

 

u do plan on removing it from the intake manifold, correct? i would hate to see any gunk drop down...mine was a little less dirty, but carb cleaner makes quick work of it. I also removed both sensors (IAC and TPS), then used a tooth brush to clean the throttle body.

 

Do it the right way and take that TB off the engine before you clean it. It will also be easier getting the IAC off if you take the TB off the engine. Regulat carb cleaner will work on the TB, but get some sensor cleaner for the IAC.

 

Do not use carb cleaner on your throttle body - - EVER! There is a coating on that plate that will be removed (left sticky) if you use carb cleaner. Use a cleaner labeled for throttle body/air intake.

 

shoot, I stand corrected. I forgot all about that coating.....

 

The Idle Air Control (IAC) is mounted on the back of the throttle body. The valve controls the idle speed of the engine by controlling the amount of air flowing through the air control passage. It consists of a stepper motor that moves a pintle shaped plunger in and out of the air control passage. When the valve plunger is moved in, the air control passage flows more air which raises the idle speed. When the valve plunger is moved out, the air control passage flows less air which lowers the idle speed. Over time and miles, the IAC can get carboned up which can have an adverse affect on idle quality. Cleaning the IAC may restore proper function and is an easy procedure to perform and good preventive maintenance so it is never a bad idea.

CLEANING THE JEEP 4.0 IDLE AIR CONTROL

Remove the air filter cover, associated hoses and the rubber boot that goes from the air filter cover to the throttle body. Remove the IAC with a torx driver (2 bolts; one can be kind of hard to get to)

“Gently” wiggle out the IAC from the throttle body. Gasket on the IAC can be re-used if it is not damaged

Clean the IAC with a spray can of throttle body cleaner; inexpensive and available at any place that sells auto parts. Throttle body cleaner is recommended rather than carburetor cleaner as it is less harsh, safe for throttle body coatings and is best for this task. Use cleaner, a rag and a toothbrush and or Q-Tips. Be gentle; don’t twist or pull on the pintle that protrudes from the IAC as it is fragile and you could damage it.

Thoroughly spray clean and flush where the IAC seats in the throttle body with the same spray cleaner

It is also a good idea to clean the entire throttle body itself, the butterfly valve inside of the throttle body and all associated linkage as long as you have things disassembled

Reinstall IAC and check idle quality

 

Okay, well I have good news bad news and embarrassing news.

Bad-I used carb cleaner

Good- I didn't take the plate off and so I only used the carb cleaner on top of the plate and around it.

Embarrassing news- I couldn't get the iac off, I had the right screwdriver for it (the hex one I think it's called) but neither screw would buldge.

 

Make sure you use a star tip it's a six sided tip.

 

Stop being lazy and take the TB off!
Remove intake tube, 3 torx bolts and a couple cable/wire connections, and you have it off. Simple, Easy, Takes 10 mins or less.

Also, If you use this sometime (or just simply look around) you will see that there is a writeup on how to clean the IAC. I did it with the TB on, but I will be doing one once it gets warmer with the TB off.
You can also click the link in my sig, go to tech articles, and find it.

 

Yea, it fit nice and snug, but I'll just have to go at it again. For the butterfly valve, do I just take the driver to those screws on it?

 

i beleive u can check the iac if it works by leaving the electrical plug connected while the iac is out, just turn your key on and see if the pintle thingy moves in,if it doesnt it might be bad and im not sure if u can clean that to get it to work. i just did it yesterday with my dodge car.replaced it that is.