The Ford Barn - View Single Post - No Go -Coil Voltage

koates · 12-20-2019, 07:47 PM

Karl, as I said before the voltage out of the resistor at 2.9 volts does not mean that the resistor is faulty. If the ignition has been on for a couple of minutes or the resistor is warm from previous testing (engine not running) then you will get a voltage reading like that. The hotter the resistor gets the higher its resistance value and the lower the output voltage will be. The resistor is designed to operate with the engine running and not just sitting with the ignition "" ÖN " and the engine not running. All voltage testing has to be done with the distributer timing points closed so that the ignition coil is drawing current, otherwise its a waste of time. Check the spark strength at the plugs. DONT keep blaming the resistor because it is more than likely OK. I have worked on these cars for over 50 years and have rarely found a faulty resistor. The resistors that play up are the reproduction ones. Original FORD ones are the only ones to use. Regards, Kevin.

12-20-2019, 07:47 PM	#5
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,079	Re: No Go -Coil Voltage Karl, as I said before the voltage out of the resistor at 2.9 volts does not mean that the resistor is faulty. If the ignition has been on for a couple of minutes or the resistor is warm from previous testing (engine not running) then you will get a voltage reading like that. The hotter the resistor gets the higher its resistance value and the lower the output voltage will be. The resistor is designed to operate with the engine running and not just sitting with the ignition "" ÖN " and the engine not running. All voltage testing has to be done with the distributer timing points closed so that the ignition coil is drawing current, otherwise its a waste of time. Check the spark strength at the plugs. DONT keep blaming the resistor because it is more than likely OK. I have worked on these cars for over 50 years and have rarely found a faulty resistor. The resistors that play up are the reproduction ones. Original FORD ones are the only ones to use. Regards, Kevin.