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Thread: Jeep engine stops running while driving

  1. #1
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    Default Jeep engine stops running while driving

    One morning I noticed that it ran sluggish when first started. Then a few days later it started running sluggish when first started and then after running it for a while. I was driving back from drill last month and it stopped running while traveling at about 65mph on the highway. I had it towed to a local shop. They replaced the ignition coil and the jeep restarted but still ran sluggish. They then replaced some gaskets on the fuel pump (I think). It was still running sluggish and they wanted to just keep replacing parts until it worked again. I took it home and replaced the spark plugs, distributor cap, and distributor rotor. It now seems to have more power when reving but still runs sluggish. Any suggestions? Thank you ahead of time.

    ~mcD

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    Geländewagen Bigskyxj's Avatar
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    Check your fuel pressure. If it is pretty low it could cause sluggishness. Might be a fuel pressure regulator or plugged fuel fiter.
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    darwinism at its best irish1371's Avatar
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    years and make of jeep?
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    1999 Jeep TJ with about 72k miles.

    I'll have to check those items related to the fuel system. Thanks!

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    X2 on the fuel filter

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    Member bluedragon436's Avatar
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    Ok, I am going to say that this is almost exacty what happened to me in my 98' XJ... and after having a shop look at it and replace a few misc. parts we found it to be a bad CPS... The crankshaft position sensor is located on the bell housing there is a harness near the rear of the intake manifold, that when you unclip it should have three pins, and will have a small cut out at one end... there are two bolts holding the sensor in, and there are ways of checking if it is good or not.. I would say check that sensor out.. check out this thread on NAXJA, post #3 for cheking it out!! it is roughly $100+ to purchase new, so if you know of anyone who has a Jeep and will let you use theirs to see if it will help... I would check that out as well... Just a thought!!

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    Junior Member kasper80nar's Avatar
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    Default Idea for ya

    Well I have an 87 YJ so its not the same got that but someone just suggested to me have my ignition modual checked parts store should do this for free. So it might be an easy fix if it works for you. And hey free is a price anyone can afford lol....

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    Thank you all for the posted comments. I will try the suggestions later on this week and the upcoming weekend. I will post my discoveries.

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    I would first go to the fuel filter and then watch were you buy gas. some stations actually have water in their tanks and that will cause a whole headache of problems. so basically i am saying replace the fuel filter and then run some drygas through your system and see how that helps.

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