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    Check engine light coming on due to loose gas cap???

    I have a 2003 Grand Cherokee. I have been running into problems with my "check engine" light coming on. I took it to Auto Zone and they said to tighten the gas cap, it worked and the light went off. I have done it several times over the last 2 yrs. Now my light is on and won't go off. They...
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    No more vacuum in fuel sys

    My 03 Grand Cherokee is doing the same thing. I have the problem off and on for about 2yrs. Tightening the gas cap always worked until the 3 weeks, now the "check engine" light won't go off. Auto Zone mentioned buying a new gas cap, but it's got to be something more challenging than that.
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    Hi from southwest Missouri

    Hi, I'm new to this site, my dad told me about it and told me to check it out. I like to do all my own repairs on my jeep so he said this might help me out if I get stuck on something. :-)
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