03-03-2018, 04:46 PM
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#2
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Senior Member
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
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Re: Troubleshooting: need nominal 12v ignition coil/condenser values
Quote:
Originally Posted by COE Dan
Ford Barners,
mmmmmmmmmmmmmmmmmm
My 47 COE has been converted a while ago to 12V. I have a 12V stock type coil and condenser (from Macs or similar) running with a Napa ignition resistor for 12V vehicle.
What are nominal values for the coil (primary and secondary resistance)?
primary 1.5 ohms, secondary 8500 ohms .....secondary may vary but needs to be in the thousands.........primary must be 1.5 to 3.0 (3.0 if no resistor is used)
What should the matching ignition resistor value be?
1.5 when used with 1.5 ohm coil
What capacitance value (microfarads) should the condenser have?
.25 to .27 pretty standard
My truck started having problems about 8 months ago which manifested itself as a slow power falloff and reduction in rpm to zero. No throttle adjustment would recover rpm stability. Once the engine quit, I could turn off the ignition, turn it back on and hit the starter and the engine would catch and I could continue to drive normally.
Heat? Condensor?? Is the coil hot when dieing ???? Whats the resistance on the coil ???? Too low =too much heat...
I've gone through the fuel system and now I'm checking the ignition circuit. Any assistance would be appreciated. Thanks,
Dan
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