Question about 1996 Jeep Grand Cherokee

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Jeep will not start unless you give it gas and then after it is running if you take your foot off the gas pedal it dies. Car has new starter.

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  • mombec Jun 21, 2009

    Ok Molson02536, I am ready to try this...but where is the throttle body on a 1996 Jeep Grand Cherokee Limited?

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2 Answers

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  • Jeep Master
  • 3,854 Answers

It sounds like the idle air control valve (IAC) may be stuck with carbon build up. You can ether remove the IAC, or if your lazy like i am, buy two cans of Throttle body cleaner. Just follow the instruction on the can and pay attention to the IAC, try to spray the Throttle body cleaner hose towards the IAC. DO NOT USE CARB CLEANER, it's too corrosive to the gaskets used on throttle body's. If your going to remove the IACThe 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. Btw, to save some cash, pull the valve out and clean it, this usually fixes the problem for quite a while. Look for crushed / cut, just any signs of damage to the wire harness to your IAC. After you have cleaned the IAC and still have the problem, you may have a bad IAC and needs to be replaced. Good luck and hope this helps. 

Posted on Jun 21, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jun 21, 2009

    If you follow the air intake tube from the air cleaner housing to the engine, where the intake tube connects is the throttle body. There should be a cable connected to it from the firewall and a few wires. The other thing that would cause this problem is a bad MAP sensor, disconnect the MAP wire harness and see if it starts with out goving it gas. If it starts, change the MAP sensor. 


    Recap: Inspect vacuum lines at MAP sensor and at Throttle Body. Repair as needed.
    Test the MAP Sensor output voltage at the MAP Sensor connector terminal B (as marked on the sensor body). This is done with the ignition switch ON and the engine OFF. Output voltage should be 4-5 volts.



    The MAP (Manifold Absolute Presssure) sensor is located under the throttle body and will have an electrical connection as well as a vacuum line going to it. If you follow the air tube from your air filter box to the top of your engine the throttle body lives under there and removing the plastic nut where the air tube terminates will allow you to see the throttle body and the other associated parts. Go to a parts store like Auto Zone and ask to see a Map Sensor for your specific engine and you will then be able to immediately identify the thing on your engine. 
    The exact location of the MAP sensor is slightly different depending on the engine that your Jeep has.

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  • Jeep Master
  • 6,982 Answers

It's nice that your starter is new, but your starter does not start the car...it turns the engine so it can start. So it has nothing to do with your problem...I would check for vacuum leaks at each and every vacuum hose. Then look at possible throttle position sensor and idle control valve./ valve passages. (there are electrical tests you can make on these and valve can be cleaned with carb cleaner, (carefully without turning internal plunger.)

Posted on Jun 21, 2009

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