Question about Jeep Liberty

3 Answers

I have a 2003 Jeep Liberty 3.7. Started off the day running fine, ended up stalling. It wil start and run until it warms up and then it will stall at low idle. as long as the acellerator is pressed some it will run. Take your foot off and it dies. It will idie until the engine gets warm, I the throttle body and air bypass valve but it was not the problem. Can anybody Give me some direction?

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  • lrtyson Apr 18, 2009

    I Have looked for the EGR valve earlier tonight but I don't know where it is located. I will be back at this in the morning. will I be able to get more help then if I need it?

  • lrtyson Apr 18, 2009

    I have looked everywhere for the EGR and I can't find it. This is a 2003 3.7 multiport FI Jeep Liberty. There is nothing on top of the engine next to the throttle body on either side. My wife tells me the vehicle was running fine and then all of a sudden the rpm's started surging from low to high and than the engine quit. it will start and run until warm up and then it dies. I have checked the throttle positioning sensor and the bypass valve under it on the throttle body. What next?

  • lrtyson Apr 18, 2009

    Have you found the location of the IAC valve yet?

  • lrtyson Apr 23, 2009

    I hav since taken the jeep to be analized. They found 4 burned out coils and replaced them. I picked up the jeep and drove it 8 miles home and it ran fine. I went out a little later and the problem started again. Back to the shop where the found three burned out coils. Two of the new ones and one old one. What can be causing this?

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3 Answers

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  • Master
  • 3,866 Answers

This will need to be investiagted on the cause of why its burning coils, Have them run a check while its on the road they have a prtable that hooks up and runs codes, i would have them also look at the coils they put in as well maybe our of spec its hard for me to tell without being under the hood.

Posted on Apr 23, 2009

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  • Jeep Master
  • 19,396 Answers

Th IAC control inlet (wht you called the valve) is located on one side of the throttle body.

Apart checking if IAC is obstructed, more likey you will need to replace the IAC control module.

Check also Throttle position sensor and air intake mainfold temperature sensor, that can cause similar problems when they fail.

You can locate all parts checking the diagram below:

I have a 2003 Jeep - f39f65b.jpg

Posted on Apr 18, 2009

  • Ginko
    Ginko Apr 18, 2009

    Before replacing parts try also cleaning the IAC connector and orifice.

    To remove the IAC you need to undo 2 screws, and the IAC will come off.



    Once you remove the IAC, spray the solenoid contacts and connectors and the socket on throttle body with throttle body cleaner, like the Wurth Throttle Body Cleaner Aerosol.

    Then gently use a soft toothbrush to clean the
    plunger taking care not to move, push or rotate the plunger.


    Also clean the inside of the
    throttle body with Wurth cleaner, and mount the IAC back in place.

    Here also my previous comment:

    Th IAC control inlet (wht you called the valve) is located on one side of the throttle body.

    Apart checking if IAC is obstructed, more likey you will need to replace the IAC control module.

    Check also Throttle position sensor and air intake mainfold temperature sensor, that can cause similar problems when they fail.

    You can locate all parts checking the diagram below:





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  • Master
  • 1,902 Answers

Check your idle Air control valve which is next to your EGR valve. This also tells your engine the throttle position. If that is ok then you can check your throttle positioning sensor which is located on the throttle body itself

Posted on Apr 18, 2009

  • Jeremy Reddick
    Jeremy Reddick Apr 18, 2009

    Yes you will and also it is located to the right of your throttle body near the back of the engine but on top

  • Jeremy Reddick
    Jeremy Reddick Apr 18, 2009

    Check your IAC valve. If you give me a few minutes I will try to find the exact location of the IAC Idle air control valve.

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