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No spark, gonna set it on fire!

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Old Dec 2, 2021 | 11:01 AM
  #1  
Veedubboy91's Avatar
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Model: Cherokee (XJ)
Default No spark, gonna set it on fire!

I need some insight. I've tested at the plug for the coil, there is 10-12v constant while cranking, but no pulse. I've tried a handful of cps, replaced the cam sensor, tried plugging in another computer, Tried plugging in another coil. I've been up and down the harness looking for damage, found a plug in the harness under the fuse box that runs to the starter/AC//coil etc. Plastic is deteriorated and starting to crumble but connections seem in tact and there's no corrosion. Haven't pulled every fuse but looked at the ones that seemed important. Swapped auto shutdown relay.
I'm seriously a ****hair away from burning her down.
Help please?
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Old Dec 2, 2021 | 12:17 PM
  #2  
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From: PA
Year: 1997
Model: Cherokee
Engine: 4.0L
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No pulse, as in the injectors arent firing? Dirty grounds, maybe. What year? And what brand crank sensors have you been using?
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Old Dec 2, 2021 | 05:02 PM
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Originally Posted by fb97xj1
No pulse, as in the injectors arent firing? Dirty grounds, maybe. What year? And what brand crank sensors have you been using?
one side of the plug on the coil is supposed to be constant power and the other side should pulse during cranking.
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