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View Full Version : Cleaning IAC


Mudderoy
05-22-2011, 06:15 PM
I've been wanting to clean the IAC for awhile now. I have to crank two or three times to get the 4.0L running, then it idles rough for 5 seconds.

I noticed that it would start right up after a good SeaFoam'ing.

So since it's almost June I decided to do it today. :(

I won't know until tomorrow and I guess really in two or three days if this really made a difference, but it did start right up after the cleaning.

The main thing I wanted to share was how incredibilly simple it is to take off and on the three sensors/controls on the throttle body if you just take the damn thing off the intake first! :smiley-laughing021:

There are 3 cables that snap on the throttle body and three connectors to the sensors/controls and four bolts that hold the throttle body to the intake.

Then it is very simple to take off the IAH, TPS, and MAP.

All I took off was the IAH.

Since I had the throttle body off I cleaned it again, but this time more throughly since the first time I did it still attached to the intake.
Mudderoy
05-23-2011, 09:40 PM
http://youtu.be/nxFIFkH-OFM

http://youtu.be/6EOvPYOwyIM

http://youtu.be/EnWD5vewX9w
saar
05-31-2011, 09:42 AM
hi,

I cleaned mine yesterday, make sure you have a T20 screwdriver to open it.
Saar.
Mudderoy
05-31-2011, 11:32 AM
I ordered a replacement IAC last week. We'll see what a new one does. :D
1ATony
06-13-2011, 03:02 PM
Most of the time it's easier to just replace a faulty IAC.Haven't had to much success in the past with cleaning them.
Mudderoy
06-13-2011, 03:43 PM
Most of the time it's easier to just replace a faulty IAC.Haven't had to much success in the past with cleaning them.

Yep I've heard that. I installed the new one, and I haven't seen a change. Still find it strange that the 4.0L goes to 1 start attempt for a day or two after cleaning the throttle body. It doesn't matter if I seafoam it or manually take it off and spray brake cleaner all over it and wipe it clean.

Very strange.
4.3LXJ
06-13-2011, 04:21 PM
Might be a computer problem then Tony. Does it do it if you disconnect the battery and clear it by touching the cables together?
Mudderoy
06-13-2011, 05:53 PM
Might be a computer problem then Tony. Does it do it if you disconnect the battery and clear it by touching the cables together?

I'll have to try that again, but my gut says no. I've changed sensors and reset the computer but it still did it, but like I said I'll have to try it again to be sure.