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EFV-8 Club Forum / General Ford Discussion / No Spark on 39 Ford

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Discussion Topic: No Spark on 39 Ford -- page: 1 2 3

budlite28

11-11-2021 @ 8:36 PM

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Thanks. Tom

TomO

11-10-2021 @ 5:38 PM

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You can check if the resister is in the circuit by using a voltmeter at the coil. Connect your voltmeter to the wire on the top of the coil and turn on the ignition switch. The meter should read battery voltage or a voltage around 3 volts.

If it reads around 3 volts, your resister is in the circuit. If it reads battery voltage, tap the starter button to nudge the engine until the points close and read the meter. If the voltage only drops slightly from battery voltage, the resister is not in the circuit. If you do not read any voltage, the ignition switch could be bad.

The easiest way to access the resister is to put a pillow on the floor of the car and get in the car upside down with your feet on the back of the seat. The nuts holding the wires on the resister are usually 11/32". On e wire should come from the switch and the other will go to the coil. The switch wire terminal may have the radio and heater wires on it also.

If the voltage checks out and you still have weak or no spark, try running a jumper directly from the battery NEG post to the coil input. Try starting the car. Do not leave the jumper on when you are not cranking the engine. That means if it starts remove the jumper, if you have used up your 20 second of cranking and going into the 5 min rest for the starter, remove the jumper.

Tom

budlite28

11-10-2021 @ 2:33 PM

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you gotta be a fr*gg*n gymnast to be it out. I'll try again tomorrow

carcrazy

11-09-2021 @ 8:19 PM

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The resistor for the primary circuit of the ignition system is located in the passenger compartment. It is on the firewall above the steering column.

budlite28

11-09-2021 @ 3:43 PM

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Installed new coil with new condenser. STILL NO GO!!!!!!!!!!! Only thing left is the ballast resister. Where is it located? I can't seem to find it.

TomO

11-09-2021 @ 6:33 AM

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Make sure that the ballast resister on the inside of the firewall is connected. If that is not used, the coil will overheat causing it to fail.

Tom

budlite28

11-08-2021 @ 7:27 PM

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I've gone thru 2 coils in the last 6 m0s. I've got one coming that was rebuilt by Skip Haney. At least I can have it rebuilt. The other 2, I'll use for bookends

TomO

11-05-2021 @ 8:35 AM

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Old coils for the 37-41 V-8 are a cr*p shoot. I bought a NOS Ford coil with the light brown top and black base and tested it. It failed the heat test, but I also bought a black used coil at the same swap meet that has tested good for the past 5 years and I carry for a spare. I also carry a spare rebuilt from Skip, because I have more faith in it.

Tom

carcrazy

11-05-2021 @ 7:08 AM

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In my experience, many of the new coils are junk. Several that I have recently purchased lasted less than 10 minutes. The older coils were much better. Recently sold a Flathead Ford that we had driven fifteen thousand miles and never had any problems with the coil. This coil was on the engine when we purchased the car six years ago and it was still going strong!

marko39

11-05-2021 @ 6:50 AM

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I got a new coil off eBay. Got it for half price of catalog. It was a Carpenter coil made in China. Was running engine in garage and just died. Installed very old coil and ran fine. The new coil lasted less than one hour. Guess it was not such a bargain after all.

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