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98 xj hesitates and clunks 2-4 times at random times

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Old 08-17-2017, 07:30 AM
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How does one do that?
Old 08-17-2017, 07:33 AM
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So is heat and vapor lock not the issue?
Old 08-17-2017, 07:34 AM
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https://www.cherokeeforum.com/f2/jee...ocedure-46047/

It's free to try, so the price is right. Remove both cables from the battery, touch the cables together...just follow the instructions.

See if it still does what you're describing right after you reset the ECU. I'm curious.
Old 08-17-2017, 07:37 AM
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Originally Posted by cammykool
So is heat and vapor lock not the issue?
Don't know, maybe...but this is free to do, so might as well give it a shot.
Old 08-17-2017, 07:39 AM
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Originally Posted by roninofako
Don't know, maybe...but this is free to do, so might as well give it a shot.
Troubleshooting problems like this can take a while to nail down. Process of elimination.
Old 08-17-2017, 07:52 AM
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Do I disconnect and touch both positive and negative cables while off the battery? My positive cable won't reach to the other side of the battery
Old 08-17-2017, 08:05 AM
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Originally Posted by cammykool
Do I disconnect and touch both positive and negative cables while off the battery? My positive cable won't reach to the other side of the battery
Danger alert! Do not touch positive cable to negative battery terminal!
The battery is not involved in this procedure. Remove both cables from battery, touch cables together. Do not let them contact battery terminals.

Anytime you disconnect a car battery, remove negative first. When reconnecting, install negative last. This will prevent accidental shorts.
Old 08-17-2017, 08:07 AM
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My cables we're too short lol
Old 08-17-2017, 08:09 AM
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Originally Posted by cammykool
My cables we're too short lol
Designed that way so you do not fry the jeeps electronics.
Old 08-17-2017, 09:46 AM
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Do not bridge the battery posts/terminals, at all. EVER. That is a short, and the battery could explode. Hydrogen gas and sulphuric acid. Nasty combination.

I once accidentally bridged both sides of the battery when i dropped a wrench. A couple sparks, a little smoke. Thankfully, luckily, the wrench fell to the ground right away. Nothing blew up, and the cables were not connected so harm done. Except to the wrench. There is a burr where it got singed.

If you are going to disconnect either cable, cover the post with something non-conductive, just in case. I forget where i got them, but i use two rubber vacuum caps that fit over the posts.
Old 08-17-2017, 03:20 PM
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I did the ECU reset this morning. I'm going to drive it around to get it to temp. See if I can't replicate the issue.
Old 08-17-2017, 08:58 PM
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LOL
Old 08-18-2017, 09:24 PM
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It hasn't happened since doing the ECU reset but it happens most often will I'm at work so we will see
Old 08-19-2017, 01:08 PM
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Bad news fellas. It did it again. This time a little longer at a higher rpm
Old 08-20-2017, 07:28 AM
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Cammy, does your XJ sit and idle for extended periods of time or only see low-speed use frequently?



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