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Unread 07-04-2012, 04:49 PM   #1
dsims1987
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1987 jeep wrangler 4.2 no spark

Have replaced ignition control module the ignition coil spark plugs ignition switch pick up coil rotor and distributor cap still nothing anyone have any ideas?

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Unread 07-04-2012, 09:21 PM   #2
kilo1974
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May be a beating a dead horse here but,, have you pulled off dizzy cap and cranked engine over to see if your rotor is rotating,,, you may have a broken pinion gear on your distributor,,, just a thought..
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Unread 07-04-2012, 09:30 PM   #3
dsims1987
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Yep I did its still spinning
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Unread 07-04-2012, 09:41 PM   #4
kilo1974
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And you have no blown fuses or anything??,, I had an issue similar to that with an early 90 's full size suburban,, turned out that my ecumenical fuse was blown,, thus no spark, but plenty of crank,, go figure..
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Unread 07-04-2012, 09:52 PM   #5
dsims1987
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I was thinking the only thing left to change is the computer but someone told me I could change the ignition system out and bypass the computer have you ever heard of that ? And yes checked the fuses.
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Unread 07-04-2012, 10:04 PM   #6
kilo1974
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Bypassing the computer is something that us with 85 to 95 wranglers and cjs do to put your jeep back to a pre 82 or so state of mind,,,it's referred to as the nutter bypass,,, very effective solution to the computer controlled ignitions and carburetors of the early (experimental) 90 's,,, look up nutter bypass in the forum home page,,, and look for an article written by mike romaine,,, very helpfull if you are starting from the beginning ..hope the info gets you going in the right direction,, happy jeepin
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Unread 07-04-2012, 10:08 PM   #7
dsims1987
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Thanks for the info will do
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Unread 07-04-2012, 10:14 PM   #8
kilo1974
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The only thing tricky about the write up on the bypass is the color on the wiring,, there is a minor discrepency between cj and wrangler as far as the colors,,, if you get into it hit me up and I will do my best to help,,,, I did the bypass on my 90 wrangler 4.2 some time ago and had nothing but good results in the end..
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Unread 07-05-2012, 11:15 AM   #9
dsims1987
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Tank you so much it's running now but none of my gauges work is that part of bypassing the computer or seperate problem
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Unread 07-05-2012, 11:35 AM   #10
kilo1974
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That would be something different,, be sure to wrap all connections well and check all connections..you may have unplugged something accidentally.
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Unread 07-05-2012, 04:37 PM   #11
dsims1987
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20 amp fuse and they are working thanks for all your help
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Unread 07-05-2012, 06:18 PM   #12
kilo1974
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Awesome to hear your guage issue was a fuse, also glad to hear that you got the jeep going again,, happy jeepin friend
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Unread 07-05-2012, 09:15 PM   #13
cruiser54
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Do a GM HEI distributor conversion and don't look back.
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