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  • Won't Keep Running !!

    Hello to everyone, I have a 91 yj 4.0, auto, that will just stop running . Let it set a couple of minutes & it will fire back up & run for a couple of miles & then die again. I have replaced the fuel pump, gas tank, fuel filter. Does anyone have any ideas what may be causing this? Any help would be greatly appreciated!!

    The yj has 3" body lift , running 33"s::

  • #2
    mine does that after a long steady ride. I have been told that the ecu is to blame.
    They said to feel the red wires going to it and if they are hot thats the problom.
    don't know for sure but they do get hot when it happens.
    2 cents


    • #3
      This may be a long shot but in 91 Jeep had a problem with the coils they were using. My Jeep (purchased new in 91) was in the shop countless times for intermittant stalling like you describe. It eventually ended up being traced to a bad coil. If memory serves there was a service bulletin sent to the dealers about it. Try putting in another coil and see if it helps. (borrow one if you want to save $$ just to test)