Blowing Coils
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Joined: Jul 2002
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From: Iowa Park USA
Blowing Coils
I have an '80 F150 with a 302. In the last 2 months I have blown 3 coils. It's about to drive me insane. A mechanic friend told me the only thing that can ruin a coil is too much voltage ot you just get a bad part. He also said that if it was the voltage problem, I'd be blowing light bulbs and stuff too. That hasn't happened, and I don't think I'd get 3 bad coils in a row. I didn't buy the cheap ones either. Any help would be GREATLY appreciated.
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Joined: Jan 2008
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Blowing Coils
Factory or aftermarket ignition?
If factory, How many volts to the coil + terminal with the engine running? Should be 12V at start then down to 6-8v while running.
Let us know this first.
[font color=red]Dennis
FTE Assistant Administrator
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[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
64 1/2 Mustang Pre-World's Fair Car #8092
68-Mustang 289 2v-Sunlit Gold
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If factory, How many volts to the coil + terminal with the engine running? Should be 12V at start then down to 6-8v while running.
Let us know this first.
[font color=red]Dennis
FTE Assistant Administrator
[/font]
[link: motorhaven.autoanything.com|How YOU Can Support This Site]
http://www.clubfte.com/users/mil1ion/canada_flag_animated.gif
[link:www.clubfte.com/users/mil1ion/Mil1ion.html|My Website,"North Of The 49th"]
[link:www.ford-trucks.com/guidelines.html|Club FTE]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG
[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
64 1/2 Mustang Pre-World's Fair Car #8092
68-Mustang 289 2v-Sunlit Gold
[/font]
Thread Starter
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New User
Joined: Jul 2002
Posts: 5
Likes: 0
From: Iowa Park USA
Blowing Coils
[updated:LAST EDITED ON 31-Jul-02 AT 09:10 PM (EST)]It's OEM ignition with a Bosch coil. I checked the voltage and it varied from 6.4 to 9.2 volts when running. I also discovered that the last coil wasn't blown. I got the truck to start on this coil, but it was blowing alot of black smoke out the exhaust and it really smelled like fuel. It'll only idle for about 30 secs and then it dies unless you keep the rpm's way up. I'm runnning an Edelbrock intake and carb. Any thoughts on where I should look to next?
