98 Cherokee Sport QUIT cause Unknown - JeepForum.com
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post #1 of 3 Old 03-01-2017, 07:34 PM Thread Starter
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1998 XJ Cherokee 
Join Date: Mar 2017
Location: Bullhead City
Posts: 4
98 Cherokee Sport QUIT cause Unknown

My 1998 Cherokee Sport with 4.0L six Just died on me in the middle of a intersection. No indications, no back fire jerking or anything. My son in-law has been helping me as I can not get under it and such due to my disability.
We DO NOT HAVE ANY SPARK AT THE SPARK PLUGS. We have checked all the relays and fuses, we have replaced the coil, the crank and Cam sensor, I even sent the PCM (Brain Box) off to be checked and rebbuilt ( it was OK no rebuilt needed ) WE are at a totle loss as to what it could be. Gets gas turns over just fine just NO spark. Would like to get it going so I don't have tpo rely on family to go to VA Medical center.
Does anyone have any Ideas what else we can check or replace I have allready put more $ that I can afford to in it so I can stop now need it to run
HELP !!!

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post #2 of 3 Old 03-05-2017, 10:50 PM
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1992 XJ Cherokee 
Join Date: Feb 2007
Location: Ewing, NJ
Posts: 1,705
Is the coil getting power / sending spark to the cap?

- Justin

1992 Cherokee Laredo - mostly stock, DD. 300k miles and counting

2004 Grand Cherokee Laredo - 4.7, bone stock - Wife's DD

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post #3 of 3 Old 03-06-2017, 07:38 AM
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2006 TJ Wrangler 
Join Date: May 2008
Location: Westchester, NY
Posts: 26,535
I'd go over the harness carefully. There are places where it can rub and if a short to ground develops the PCM will not get good, consistent signals from all the sensors and will then not know what to do. One place in particular I've had it happen on my XJ is where the harness runs between the valve cover and the firewall. There is a stud that sticks up from the corner of the block and the harness can impale itself on that stud. I know I've seen a few other threads where people have had that one happen.
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