The Ford Barn - View Single Post - Troubleshooting: need nominal 12v ignition coil/condenser values

COE Dan · 03-03-2018, 04:32 PM

Ford Barners,

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)?
What should the matching ignition resistor value be?
What capacitance value (microfarads) should the condenser have?

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.

I've gone through the fuel system and now I'm checking the ignition circuit. Any assistance would be appreciated. Thanks,

Dan

03-03-2018, 04:32 PM	#1
COE Dan Senior Member Join Date: May 2010 Location: Now in Wichita, KS Posts: 251	Troubleshooting: need nominal 12v ignition coil/condenser values Ford Barners, 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)? What should the matching ignition resistor value be? What capacitance value (microfarads) should the condenser have? 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. I've gone through the fuel system and now I'm checking the ignition circuit. Any assistance would be appreciated. Thanks, Dan