Thread: won't start

  1. won't start

    Hi. Have a 91 Cherokee 4x4. I tried to start it this a.m. and nothing. Turns but won't catch. I just ran it with no problems about 5 days ago. Thought maybe I was out of gas and topped off the tank and it is full.
    It tries to catch once in a while. I hear the fuel pump kicking in but don't think its getting fuel. I don't know what to look at other then a fuel filter. I believe I changed that just a couple years ago.
    Any help would be appreciated.

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,184

    Re: won't start

    You need three things. Air, fuel and spark.
    Load test the battery, check the fuel pressure and check for spark at a plug.

    Any codes?


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3

    Re: won't start

    Thanks. Never thought about spark plugs. Its been a while since I've changed them. I'll put a new set in and see what happens. I know it has fuel and air, so the plugs could be it. Thanks again. I'll let you know how the plugs work out.

  4. #4
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
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    won't start

    Put the correct plugs in.
    Like autolite AP985 if stock 2.5 or 4.0

    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  5. #5

    Re: won't start

    1st thing I did.

  6. #6
    Join Date
    Feb 2009
    Location
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    won't start

    Quote Originally Posted by wivrrat View Post
    1st thing I did.
    Still having the issue?
    If you verified spark, fuel pressure and air the last think would be timing.




    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  7. #7
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,184

    won't start

    Does your Jeep have security system?

    Found this
    There is no chip in the key on a 1991 factory security system.

    Just attach your battery cable and while the lights are flashing insert the key into the ignition and cycle the key a few times without turning over the motor and it should reset and disable the security system so you can start your XJ.

    The key alone disables the security system when you insert the factory key into the driver door or rear hatch locks (when system is enabled and locked) and cycle the key. You can enable the system when leaving the vehicle by cycling the auto door locks to "lock" and shutting the driver door.

    You can simply lock the driver door with the nob or the key and the security system is bypassed.

    You don't need the remote transmitter to make the factory system work.


    Never look down on anyone unless you are helping them up - Jesse Jackson
    Last edited by JPNinPA; 09-21-2021 at 08:46 PM.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

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