coil burnout
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Elder User
Joined: May 2005
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From: Montana
coil burnout
a few months ago i purchased a f-260 4 WD which i promptly converted to electronic ignition (distributor. ) to make a long story short, i have three other slicks that i have also converted with excellent success. this one burnt out the coil ( napa super coil. ) within the first 150 miles. took it back and whinned a little and they warrented it and gave me another one. this one died on me last weekend after about 250 miles. could i be so unlucky as to get two bad coils in aa row or is there something going on that i am not aware of that is taking out the coil. i'll add here that i have the same exact set up in all my other trucks and they have been going for a coupla years now. the only difference in this truck than my other ones is that the previous owner had installed a 100 amp alternator. power to the coil is coming off the solenoid on all trucks. any suggestions??? Dutch
Mountain Pass
Joined: Dec 2003
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Sounds like you converted to a Duraspark system, correct? I think Duraspark control modules have a fixed dwell, and do not limit the current in the coil, so an external ballast resistor is required. Did your conversion include one?
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Elder User
Joined: May 2005
Posts: 581
Likes: 1
From: Montana
no on the duraspark system. i used a distributor and module from a 76 300 6 cylider. and upgraded to a better set of plugs,wires,and of course the coil.frriend of mine said the coil should have about 7-- 9 volts going to it. gonna ask him again and test the voltage this weekend. my 390 in my 66 has a malory dist. but all of my sixes have the donor dist. from the seventy series. dutch
Mountain Pass
Joined: Dec 2003
Posts: 166
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Autozone has some good information about the evolution of the Ford breakerless ignition.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
Turns out that some modules have dwell control and some do not.
I like to use the GM 4-pin HEI modules that have built-in dwell control. The ballast resistor may be omitted then.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
Turns out that some modules have dwell control and some do not.
I like to use the GM 4-pin HEI modules that have built-in dwell control. The ballast resistor may be omitted then.
Last edited by JimKoz; Jul 25, 2008 at 05:49 PM. Reason: Messed up the URL
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a few months ago i purchased a f-260 4 WD which i promptly converted to electronic ignition (distributor. ) to make a long story short, i have three other slicks that i have also converted with excellent success. this one burnt out the coil ( napa super coil. ) within the first 150 miles. took it back and whinned a little and they warrented it and gave me another one. this one died on me last weekend after about 250 miles. could i be so unlucky as to get two bad coils in aa row or is there something going on that i am not aware of that is taking out the coil. i'll add here that i have the same exact set up in all my other trucks and they have been going for a coupla years now. the only difference in this truck than my other ones is that the previous owner had installed a 100 amp alternator. power to the coil is coming off the solenoid on all trucks. any suggestions??? Dutch
If you decide to get a new distributor, consider our custom curved Duraspark Distributor built with our new Full Length Oil Impregnated Bronze Bushing. The full length bushing improves timing stability and spark scatter. If stock appearance is not an issue, take a look at our one piece D.U.I. Distributor. Whether you choose the Duraspark or the D.U.I., we curve each on a distributor machine based on your engine combination. Please see them at:
http://www.performancedistributors.com/forddistributors.htm
Also, there is now an excellent installation article on the D.U.I. Distributor on the Ford-Trucks.com site at:
https://www.ford-trucks.com/article/idx/0/358/article/DUI_Ignition_Installation_In_A_Ford_351W_V8.html
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