engine shuts down while driving - JeepForum.com
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post #1 of 6 Old 01-27-2002, 04:17 PM Thread Starter
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engine shuts down while driving

Hello all, I've a big problem with my 91 wrangler S. 2.5 liter. The engine will occationally shut itself off. I can't predict when this is going to happen. The only clue to its origin and possible resolution is that when it stalls the fuel guage pegs itself passed full. I'm guessing that this means that the guage is shorting out. Anyhow, most times if I wait a few seconds the fuel guage goes back down to its metered level and I can start the engine again. At times when it hasn't gone down immediately, I've opened the hood and tugged & pulled at the wire harness. No particular area, I just tug & pull. It seems to help. I can't reproduce the "pegging fuel guage" by messing with the wire harness so I cant reproduce the cause. Someday I'm going to get stuck. Please help. This is the first time I've used a web forum. Thanks Jamesscott

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post #2 of 6 Old 01-27-2002, 07:58 PM
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once again this happend to my roomate both his wrangler and his parents grand cherokee
it was the crank shaft possitioning sensor the dealership said. 1t was about 150000 miles on each. i couldn't find it in the book but they both work now so i guess thats what it was
the book being hayes
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post #3 of 6 Old 01-31-2002, 12:42 PM
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I think you have to different problems...
First is the immediate shut off-- check your distributor rotor its going flat which means no spark to the plugs thus engine immediate shut off...
swap your rotor and/or distributor and you should be fine there.
next is your fuel gauge sensor going crazy.
its just the float in the fuel tank doing that.. when you step on the throttle the gauge goes to Full and when at idle its back down to regular level..
you might need a new fuel float/sender unit

See y'll on the trail.
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post #4 of 6 Old 02-01-2002, 12:38 AM
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When I wired up my MSD ignition box the ground wasn't tight and the engine shut off a couple of times while I was on the freeway so I'm guessing it is the wiring somewhere to the distributor. Just a thought.

87YJ I-6 Offenhauser intake Holley 4bbl MSD 6AL box
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post #5 of 6 Old 02-02-2002, 11:59 PM
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Its gotta be your distributor, when i first bought my jeep when i was driving it home it just cut off in the middle of the road. Took a while to figure it out, but once we put a new distributor never done it again

Remember...it takes 42 muscles in your face to frown ,BUT it only takes 4 muscles to extend your arm and *****-slap the mother****er upside the head:-!
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post #6 of 6 Old 02-03-2002, 01:13 PM
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I had the same thing happen to me about six months ago. Turned out it was the fuel sending unit. It was a nightmare to replace. Since I have a 90 wrangler it was hard for the dealership to get the right part. It took six tries to get it right. Good luck
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