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Jeep Grand Cherokee PCM

19 messages,  Last post on Sep 21, 2009 at 9:41 PM

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What is this discussion about? Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, Electrical, SUV

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#18 of 19 1993 jeep grand cherokee no spark by mercyme6 Sep 20, 2009 (2:45 pm)
I am having same problems with my jeep,the check engine light does not come on when trying to start wants to start then doesnt no spark to coil or pcm took out tested coil it was bad, tested again after removing it tested good.,fuel pump is good but still no spark, ordered a pcm off ebay for $80 that came out of 93 grand cherokee same as mine but then talked to a mechanic and they said i hope it works or hope you got the right one because he said that there are different numbers and if they dont match it may not work is this right?i guess i just thought if it came out of the same year vehicle it would work.any suggestions on fuel, pump is not starting but fuel gage is good fuel pump was replaced no spark to coil.help Replies to this message: heydeno (Sep 21, 2009 9:41 pm)
#19 of 19 Re: 1993 jeep grand cherokee no spark [mercyme6] by heydeno Sep 21, 2009 (9:41 pm)
Replying to: mercyme6 (Sep 20, 2009 2:45 pm) They are right replacing the pcm it has to be set for the vehicle. When I ordered mine I still had to have it set they call it " Flash". On mine I think we found the problem. It was a shorted out fuel injector. When it shorted it would cause it to have no spark to the coil as well as have alot of other things go haywire. We replaced the fuel injector and it has not gave me any problems since. It has been about a month. So hopefull we did get the problem fixed. I am still keeping my fingers crossed though because it has been such a problem and costly.

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