1. #1
    mattsmall1972's Avatar
    mattsmall1972 is offline Junior Member
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    South or North Carolina Jeep shop wanted

    Hi folks,
    I have a little 1994 YJ 2.5L FI that my wife and I love. We bought it a couple of years ago and it's a little beater that does everything we want it to do, except run when we want it to. We've had multiple problems with it not starting a lot of the time and it shut off today while my wife was driving it. We've had it in and out of our local mechanics and it's always come back to life, but then the problems happen again. It seems like a fuel issue and we've had multiple fuel issues fixed, but the problem keeps coming back.
    We're at the point where I am willing to throw money at the problem to make it go away. I would convert to carb or put in a new engine or whatever, but I just want it to work. Does anyone have a great shop in South Carolina, or even North Carolina to take it to?
    If not, what would it take to convert this to carb to simplify life?

    Thanks,
    Matt

  2. #2
    JPNinPA's Avatar
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    Re: South or North Carolina Jeep shop wanted

    So please describe what happens and exactly how.

    Example: When we start the engine within 10 min after it ran for 10-15 min and was at temp, the engine stumbles and sometimes dies. So there is some who what when and how...


    Regards,
    JPNinPA

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    Re: South or North Carolina Jeep shop wanted

    Doesn't start or takes a long time to start. Seems like fuel problems.
    It shut off yesterday while my wife was driving it. She said the RPMs seemed really high and then it stumbled a bit and shut off. It would not restart until we got it home and then after cranking a bit, it restarted.

    I'd really like to know a good Jeep specialist to take this to.

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    Re: South or North Carolina Jeep shop wanted

    should not need a jeep specialist, this is basic automotive 101.

    And going to a carb set up is going backwards big time.

    BASIC tests
    If you can get any codes in system, Fuel injection always get fuel pressure and then with KOEO observe pressure drop.
    High RPM suggests a vacuum leak - use the old school carb spray trick to locate....

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    South or North Carolina Jeep shop wanted

    To start
    Turn the key to on without starting. You will hear the fuel pump. Wait 5-10 sec then turn the key to off. Then on again without starting. Do this three times then start. If it fires right up its the check valve that is a part of the fuel pump.

    As mentioned above get fuel pressure readings key on before start, during idle and at a higher rpm.


    Regards,
    JPNinPA

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    Re: South or North Carolina Jeep shop wanted

    I would like to agree with you both. A little more history...

    The jeep has had this problem for over a year now. It runs great some days and on others, it won't start. My wife thinks it's related to moisture conditions, but I think it's fuel. We've had in the shop for weeks at a time without the problem occurring so they can't figure it out. The coil was changed once to see if that was the problem. It works good for a while then came back. I noticed fuel leaking (intermittent) around the fuel filter and a pinhole leak was found. After repair, it ran good for a while until it wouldn't start at all. I sent it to another shop and some kind of fuel line issue was found. We got it back last week and it ran good until yesterday when my wife took it out. She said the RPMs seemed high, so she turned around to bring it home when it stalled and refused to start back up. Once home, it started back up.

    I have a fuel pressure gauge hooked up to it now. It reads a "jumpy" 30 lbs at idle. With the regulator hose off, it reads 39. I let it wait a long time (several hours) until it got to 0 and it started right up.

    I think the FI works fine but I can't figure out where this problem is. I would take it to someone who really understands these jeeps, but don't want to throw good money after faulty solutions. I always figure a carb solution is simpler so I would go that route if it would work.

    I am very handy with tools but definitely am not a mechanic. More ideas needed. Thank you.

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    Re: South or North Carolina Jeep shop wanted

    This morning the Jeep won't start. The fuel pressure gauge reads 0 and does not increase for any reason. I have never heard the fuel pump start up so I am not sure if it's coming on or not. I think I need a new fuel pump and/or check valve.

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    Re: South or North Carolina Jeep shop wanted

    things to check - fuse, relay, ign sw - then is 12v at pump
    REMEMBER if not running pump oly has 12v for @2seconds-
    Attached Thumbnails Attached Thumbnails South or North Carolina Jeep shop wanted-jeep2.5-fuel-pump.jpg  

    Last edited by k-2; 05-18-2017 at 11:41 AM.

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