Question about 1986 Ford F150 SuperCab

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Burning out the pickup coil in 1986 F-150 w/302

I am having problems with my 86 Ford F150 with a 302 ci. My pickup was running fine then just quit. I restarted the motor and all was well for a bit. Then it died again. After this happened the third time within 10 min. I had a friend pull me to his garage. No spark what so ever. Put in a new coil. No go. Put in a new pickup coil in the distrib. and it started right away and ran for about a min until it died again. I restarted the truck and it ran for a few min and then died again. NO SPARK again! Replaced the coil again and it fired right up. Drove it 3-4 short trips and then it killed again. I restarted it and it ran ok when I went home last night. This am I restarted the truck and it ran for about 10 min and died again. This time it did not restart. I fear the coil is toast again. WHAT IS THE PROBLEM???? I did replace the alternator a week ago and this problem started after that replacement. I checked the alternator output with a cigarette lighter plug in device and the volts did not spike but rather ran at 13.5-14.5. I thought maybe the voltage reg in the alternator was the problem but that does not seem to be the case. Any help I can get from anyone would be greatly appreciated. I have pulled the dist. three times and it looks like I will be doing that again.

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  • genobeano Jun 17, 2009

    Thanks for your info and I will be doing just as you suggested. I did take the ignition module in to a local jobber and they did test it at that time. It passed the test on their machine so I only purchased the coil part of this assembly. I will try the complete unit this time and hope it works. Thanks again Roger.

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Hello genobeano: My name is Roger and I will give some information that should help. When you replace the pick up coil also replace the ignition module. The ignition module will short out the pick up coil. If the module is attached to the side of the distributor be sure to use die electric grease when installing the module on the distributor. Should you not use the grease you will burn up the ignition system. By the same token should the pick up coil short out the module will burn out. The fact it runs for a short time says that you have a heat problem. Normally is in the ignition system. There was a tech bulletin to replace the pick up and module as a unit to correct the problem.
Please rate the answer as this lets us know you received correct information. Should you need further help please just ask. Thank You for using Fix Ya. Roger

Posted on Jun 17, 2009

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