Question about Jeep Cherokee

3 Answers

Fuel is dripping from under the intake manifold. i've inspected the fuel rail, gas lines(in and out) injectors and pressure regulator but can't find any problems. leak is steady drip, landing on exhaust down tube. 1988 jeep cherokee sport 4.0 i6 5 speed manual trans 150,000 miles and well kept.

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  • cheekytiger Nov 12, 2009

    the leak is dripping from the actual manifold itself, i'm wondering if there's a part or line that i can't see? i plan to inspect further tomorrow in better light, but would appreciate any and all suggestions. thanks, dave.

  • cheekytiger Nov 12, 2009

    manifold's good, i'll check back tomorrow after further inspection- dis-assembly. thanks again guys

  • cheekytiger Nov 12, 2009

    thanks man, i'll pick up the dye tomorrow and try it out, i'll get back to u with what i find. thanks again, dave

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Did you look at the bottom of the intake manifold at the fuel line where it bends and transitions from rubber/nylon dorman section to the hard line that goes to the tank. Most likely the pressurized line. Honestly only so much can be done over the internet. It will take a lot of inspecting. You may want to consider picking up some UV dye to put in the fuel system to find the leak. Here is an example of the product available at an online retailer.
http://www.sjdiscounttools.com/rob16268.html
Thank you,
Lee

Posted on Nov 12, 2009

  • Lee A.
    Lee A. Nov 12, 2009

    Like I said this is something that requires 1st hand visual inspection. Once you do that and if need be use some uv dye like i previously proposed I am confident you will find the leak and be able to repair it. I hope you found my information helpful and will reconsider and accept/rate my solution accordingly.
    thanks again,
    Lee


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If their are no signs of external leaking then you must have an injector leaking. Its probably gathering at the gasket and leaking out. If you remove a couple and apply vacuum to them one will not hold. They should be sealed.

Posted on Nov 12, 2009

  • Ernset ( Skip ) Bouvette

    there is only one way fuel can get in the intake manifold. From an injector. If you have no external leaks that are seeping around then the injector will be the culprit. I assume it only leaks with the engine off and the fuel pressure still at specs. If you had a fuel pressure tester you would see it changing but seeing the fuel should tell you that already.

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Look for a damaged line or a small crack on the manifold. Also look for damaged fasteners and clamps.

Posted on Nov 12, 2009

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You didn't post the size of your engine so please pick the appropriate one:

3.8L
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  2. Drain the cooling system.
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    TIM..........

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    eb744a2.jpg

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    26456ba.jpg

    Fig. 3.1L engine fuel pump relay circuit diagnosis (1 of 2)


    b3b739d.jpg

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    db78a73.jpg

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    c8a9798.jpg

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      a5adffa.jpg
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    140d431.jpg
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    4950e4f.jpg
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    4ecb713.jpg

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    Other size engine can find in autozone.com (free register).

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