Question about 1997 Jeep Cherokee

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Not starting, dying after it's running

My jeep is a 1997. The problem is that sometimes when I try to start it, it won't start. Then when I finally get it to start, I'll be driving down the street and it will just die. It does this while the vehicle is moving sometimes but mostly it dies when I come to redlights or stop signs. Once it dies, sometimes it will start right back up while sometimes it won't start for 15 minutes. The longest it ever did this was about 45 minutes. We put it in the garage and they told us it was a bad fuel pump which we replaced and that has not solved the problem. The owner's that had it before had the computer replaced and we had another guy tell us that it may be that when they had the computer replaced they didn't reset it. We've also been told that the only way to have this reset done is by taking it to the dealership. I don't want to keep paying money for it to go in the garage if it's not going to actually fix the problem. Any suggestions would be very much appricated!

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  • Richard Scordino May 11, 2010

    Could be crankshaft sensor going bad...problem is you need to test it during the time it's in "no start" otherwise it may read as good.

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Needs a crank sensor.

Posted on May 30, 2009

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I used to have a jeep cherokee that had the same problem, replaced a LOT of parts. I finally replaced the crankshaft positioning sensor (about $50 part that is by the exhaust downpipe) and problem was fixed and never shut off again

Posted on Jun 01, 2009

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2 Answers

1997 Jeep Grand Cherokee keeps cutting off and won't start some times


I would start by going to an auto parts store and having them scan the computer for codes, even if the engine light is not on. i have heard about auto part stores saying they can not scan if light is not on. i am not sure if it is the scan tool they use or what but sometimes there could be a pending code where the computer is waiting to see the problem again before turning light on. if this is the case then ask them to scan it anyway or go to a shop and ask them to do it. the reason for this is that these trucks have crank sensor problems.

the next time is dies check for spark, remove a sparkplug wire and place a screw driver into the boot of the wire and place it near a ground, a metal surface and then have someone crank the engine and see if there is spark. if there is no spark or you got a code of the crank sensor then i would replace the crank sensor, but if you have good spark and truck will not start then try spraying starting fluid into throttle body and see if it starts and dies out if it does then fuel pump problem.

If you have a fuel pressure gauge then hook that up and crank engine and see if you have fuel pressure and how much.

I will say that this does sound like a bad crank sensor, it dies and then wont start for a while ...

Dec 29, 2012 | 1997 Jeep Grand Cherokee

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Just dies, sometimes won't start. Changed crank shaft censor, still no good


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97 jgc laredo 4.0 in line 6, 4x4...ok here it is...sometimes the fuel pump will run and start. However like now the fuel pump is not running...kinda like intermit power..sometimes it runs sometimes it...


If the pump starts to jam it wills seem like it won't run. The stuttering on startup is also related to a failing fuel pump as the intank pumps in our Jeep (I have the same ZJ)

Next time it won't start, try hitting the fuel tank with a small hammer (lighty as per not to crack it)
This can sometimes jar the pump in such a way to get the fins spinning again. If this works I would reccomend replacing the fuel pump.

You should also hear the pump prime when you turn the ignition to on (before start)
Priming the pump 3-4 times can help the stuttering on startup.

You can also get a fuel line pressure tester from most auto parts stores and verify that you are holding pressure after the pump is off.

Cheers
Dave

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1 Answer

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Robert

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