Cleaning the IAC -
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Go Back > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Cleaning the IAC

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Unread 09-08-2013, 09:54 AM   #1
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1995 ZJ 
Join Date: May 2013
Location: Bear Creek, NC
Posts: 135
Cleaning the IAC

My 95 zj has had a rough idle ever since i bought it and im finally getting tired of it. Just sitting at a stop you can feel the whole vehicle vibrating viciously. And sometimes when slowing down to a stop the rpms drop below 500 almost stalling the engine. I've heard of cleaning the IAC or replacing it but i have no idea where it is or how im supposed to "clean" a sensor. Any help?

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Unread 09-08-2013, 10:27 AM   #2
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1995 ZJ 
Join Date: Mar 2011
Posts: 101
Type cleaning the IAC in the search this forum on the ZJ main page and there you will find the info.that you are looking for.
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Unread 09-08-2013, 11:39 AM   #3
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1997 ZJ 
Join Date: Dec 2008
Location: , Alabama
Posts: 8,045
I'm picking nits here to avoid confusion, but the IAC is not a sensor. It is a motor and plunger and sends no feedback to the PCM. The PCM tells it what to do, then the engine reacts. When it reacts, other sensors give inputs to the PCM and it bases fuel information and further IAC commands on those inputs.

Now that all of that is out of the way, this thread contains what you need to know
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Unread 09-08-2013, 11:40 AM   #4
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1996 ZJ 
Join Date: Apr 2013
Location: Tucson, Arizona
Posts: 176
The only tricky thing about the IAC is removing it as the screw hole sits kinda flush with the intake manifold, and its a very tricky spot to get to. I suggest cleaning your MAP sensor as well. Google both of them real quick to find out where they are. Both of them have two screws each. Buy a bottle of MAF Sensor cleaner, which is the only cleaner you should use on sensors! Use a really soft rag to wipe it down. If you don't have the little rubber gasket for it use some RTV when putting it back.
Matte Black '96 ZJ 4.0
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