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Old 03-03-2018, 04:46 PM   #2
BUBBAS IGNITION
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Location: SPEEDWAY INDIANA
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Default Re: Troubleshooting: need nominal 12v ignition coil/condenser values

Quote:
Originally Posted by COE Dan View Post
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
Try these ....
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