Prestolite ot Motorcraft Ignition -
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post #1 of 2 Old 08-03-2002, 11:44 AM Thread Starter
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1977 CJ7 
Join Date: Mar 2002
Location: Blue Springs, MO
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Prestolite ot Motorcraft Ignition

Also posted this in the CJ forum, just covering all bases. Thanks for any help.

Ok, Here is the deal. Did not have any spark coming off of the coil. Found out that the ECM (electronic control module) was bad, replaced it and the engine ran very rough. Replaced the coil and the engine smoothed out. After running for about 3 months the engine started to run rough again and then low and behold it failed to start. Once again no spark coming off of the coil. Main question is would it be worth it to change from the prestolite to the motorcraft ignition system? And if so how much trouble would this be? Maybe Jeep only made this style for 2 years for a reason? If any could let me know that would be great. The price difference is also a factor since the prestolite is more expensive to keep replacing parts. Or if anyone has an idea as to what is causing the ECM to go bad that would help also.

"In the End Everything is a Gag...." Charlie Chaplin
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post #2 of 2 Old 08-08-2002, 10:53 AM
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Location: Southern Rhode Island
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You can switch to Motorcraft or even go HEI Conversion, which is much easier and better.

Prestolite is/can be pretty crappy sometimes, and very troublesome, in my past experiences.
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