It is very hard to diagnose a problem over the internet. Especially if you think something is good when it is not. Currently from the information you have given. It sounds like a charging or ignition problem. If you have a gear reduction starter you could have a battery as weak as 10 volts and have it crank good.

Check the voltage at the battery before starting and when the car is running.

It also sounds like you could be losing ignition.
Either the power to the ignition system (weak voltage or wiring)
Or something with the ignition system itself.

I’d rig a test light from a pig tail and tape it to the base of the windshield. Then connect one end to the ignition side of the resistor and the other end to ground.

if the light is still on when the engine quits you know the wiring to the resistor is still good. Check the voltage before and after the resistor at this time. do not shut of the ignition when testing for this voltage. If there is a ignition problem you know you have power to this point.

If the light is off you know there is a problem with the wiring to the resistor, a bad ignition switch, bad bulkhead connector or something like that.


Sorry post is so long there is not enough info given for the problem at hand.


Go down the manual and do all the checks it ask for and you should get your answer. Skipping steps just because you think something is good can get you in trouble really fast.

Or you can do what most inexperienced people/techs do and just start replacing parts. Maybe you might get lucky.