No spark from ignition coil
06-13-2011, 03:07 PM
#1
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Year: 1989
Model: Cherokee
Engine: 4.0 6cyl.
No spark from ignition coil
I have an 89 jeep cherokee and im not getting any spark from the coil. I have relaced the cps, pickup coil, ignition coil, ICM and starter relay. when I test for voltage from the coil I am getting a negative voltage reading of about 5.2. Any infor would be greatly appreciated. Thanks
06-13-2011, 04:07 PM
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Year: 1989
Model: Cherokee
Engine: 4.0 6cyl.
Thanks for the info. After further tinkering I found that I have 12v coming from the ICM but only 5.5 from bothe the old coil and new. Any ideas?
06-13-2011, 06:36 PM
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Year: 1989
Model: Cherokee
Engine: 4.0 6cyl.
I cleaned and sanded all of the grounds. I just took the new ICM to auto zone and it tested bad so i ordered a new one and hopefully it will work. thanks for the info and i will let you know tomorrow if that was the problem. thanks guys.
06-13-2011, 06:42 PM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
alot of people will return bad parts telling the coun ter guy this was not the problem and they restock the part then sell it again
06-14-2011, 03:19 AM
#7
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Model: Cherokee
Engine: inline 6
no spark
i have a similar problem in a 99 cherokee that just had the engine swapped. however i get voltage at the coil plug only when i first turn on the key, it then drops off to 0. should i have 12v at the coil plug when i turn on the key? this engine started in the other jeep and this jeeps engine ran till the engine slung a rod. let me know what you find, could this be a grounding issue only? the engine was replaced by a freind while i was out of town so i really dont know if all the grounds were connected right.
Last edited by dgwsr; 06-14-2011 at 03:23 AM. Reason: re-explained in more detail
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06-14-2011, 03:27 AM
#8
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Model: Cherokee
Engine: inline 6
no spark
found this on testing on a 88 might help http://www.links4jeeps.com/forum/ind...topic=10558.15
06-15-2011, 10:33 AM
#9
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Year: 1989
Model: Cherokee
Engine: 4.0 6cyl.
Well guys I fixed the problem. I tore out the old cps harness that runs to the ecu and replaced it with a new one. I guess the renix has a problem with the original harness. But now the damn thing runs like a champ. Thanks guys for all the help!
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