Question about 1986 Jeep Grand eer

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IAC Valve Location - 1996 Jeep Grand Cherokee

My 1996 Jeep Grand Cherokee stalls all of the time.

I googled around to see possible causes and one that kept coming up is then eed to clean or replace the IAC valve.

Where is the IAC valve located?


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  • jeff680 May 28, 2009

    Thanks guys, really appreciate the quick response.

    Molson02536 - When you say the "on the back of the throttle body", not sure exactly where you mean. Could you tell me where it is in relation to the 'hose', or whatever, coming from the air cleaner to the throttle body? I see something that might be what you described in back of the throttle body, but I also see something that sounds liek your describing to the back of the throttle body, but on the right side, directly under the 'hose' thing where it attaches to the top of the throttle body.

    Sorry if my questions don't make sense, don't know much about the engine layout and names.

    emissionwiz - what you suggest, when i figure out whwre it is, so i would need someone else to keep the car revving, in neutral, while i spray the intake cleaner in?

    Also, the air intake that the one coming from the air cleaner and then attached to the top of the throttle body? The end attached to the throttle body being ovally shaped?

    Thanks again guys! (sorry for the bolding, it did that when i copied your name)


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  • Jeep Master
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The idle air control valve is located on the back of the throttle body. It has an oval electrical connector and two torx screws holding it in. Unplug the connector, remove the two screws then lightly tap the body with a soft faced mallet to loosen it from the body. 
Once you have it out and prior to installing a new valve clean the seat inside the throttle body where the idle control fits. This must be very clean! Installation is in the reverse order. 
 To save some cash, pull the valve out and clean it with throttle body cleaner, this usually fixes the problem for quite a while.
Good luck and hope this helps.

Posted on May 28, 2009

  • Harvey N Tawatao
    Harvey N Tawatao May 28, 2009

    We can keep this simple at first. Remove the rubber hose from the Throttle body and spray the throttle body cleaner in to the little slot by the throttle body blade. Follow the instruction on the can and use the whole can. Your going to have to rev the engine from the throttle (where your throttle cables hooks up to the throttle) to keep it from stalling.

    Once the throttle body is cleaned and IAC is cleaned since it's still installed and has not been removed. Turn off the engine and hook up the re install the vacuum hose to the throttle body. We need to reset the base setting to the IAC.

    Before starting the engine, hold the gas peddle to the floor and when it starts, feather the peddle until it keeps running. If it stalls, repeat the process until it keeps running and go for a test drive for a few miles. This will insure the controller relearn the base setting to the IAC and a new IAC if you do replace it. 

    Some dealer so this after a tune up to make sure the car's and truck idles properly after they worked on the engine and will have the computer compensate for any changes in the performance issues.

    Good luck and keep me posted


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  • Jeep Master
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Clean it first. use this procedure.
Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on May 28, 2009

  • yadayada
    yadayada May 28, 2009

    u spray down the air intake of the engine.


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