Question about 1986 Jeep Grand eer

2 Answers

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?

Thanks!

Posted by on

  • 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 hose...is 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)

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Jeep Master
  • 3,854 Answers

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




×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Jeep Master
  • 75,117 Answers

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.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What is the purpose of the IAT? 2006 jeep grand cherokee laredo


Do you mean IAC. This is the Idle Air Control Valve and would be what you need to replace.
The Idle Air Control (IAC) valve is an electric actuator controlled by the engine computer, which regulates the engine's idle speed. A faulty IAC valve will make the engine idle rough and possibly stall.

Dec 31, 2014 | Jeep Cars & Trucks

2 Answers

My 04 Jeep GC is idling around 500rpm in Drive and Reverse. I had the IAC valve replaced after it was doing this about a month earlier, and it seemed to be the problem...until yesterday. The idling


it could be a new bad IAC motor...especially if its an aftermarket brand!! something like that even though the part is a little more expensive go with OEM jeep parts, especially electrical stuff.

Nov 15, 2013 | 1996 Jeep Grand Cherokee

1 Answer

My 1996 jeep cherokee sport keeps hesitating and if i let up on the gas it just dies i have replaced the iac any sugestions?


did you clean out the throttle body? a dirty throttle body can cause hesitation and stalling at idle at times.

Jan 27, 2012 | 1996 Jeep Grand Cherokee

1 Answer

My 1966 Jeep grand cherokee starts and ideals fine when I press on gas paddle and then left off of it it dies


two possible problems come to mind,,,
1.) idle air control valve (IAC) is restricted
2.) throttle position sensor is out of adjustment

to test the IAC, find a vacuum hose smaller than the size of a golf tee anywhere near the throttle body and unplug it....then start the vehicle. if the vehicle idles then replace theIAC

if this doesn't help see a technician that can diagnose the concern further and look at things like fuel trims, MAF values and BARO


Apr 05, 2010 | 1996 Jeep Grand Cherokee

2 Answers

Stalling


clean the IAC it is all you need to do. Battery voltage drops just because when the engine stalls it kills the alternator. Engine stalls beause the Idle Air Control (IAC) valve is dirt clogged. Uninstall the IAC valve, and clean it using electronic contact cleaner (3M will do). No need to spend anything else.

Feb 11, 2010 | 1997 Jeep Grand Cherokee

1 Answer

1996 grand cherokee stalls after warming up


Most likely cause if it will start back up is the IAC motor. It is what controls the idle.

Aug 30, 2009 | 1996 Jeep Grand Cherokee

1 Answer

1993 jeep grand cherokee, choking, pulling then stalled,


Check:
- Fresh Air Intake Hose: Clogged or Damaged FreshAir Intake Hose.
- Carburetor: Worn, Faulty or Damaged Carburetor.
- Mass Air Flow Sensor: Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.
- EGR Valve: EGR Valve Sticking Open/Leaking.
- Idle Air Control Valve: IAC Valve Sticking or Faulty.

Good luck.

Aug 02, 2009 | 1993 Jeep Grand Cherokee

3 Answers

Rough idle stalls at low rpm's


check your transmission fluid,the motor will stall when fluid is low

Dec 06, 2008 | 1996 Jeep Grand Cherokee

2 Answers

Stalling


Look for a possible vacuum leak Use can of carburettor cleaner carefuly sprayed around inlet manifold and around injector seals.Spray with engine running and engine will instantly react to any leak no matter how small.Dont allow fan to blow onto paint as carb cleaner will damage it.

Oct 22, 2008 | 1996 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

4,162 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

75077 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7768 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...