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12 years ago

if one of the wires that go to the coil is steel instead of copper it is the resister wire the copper one goes to the solonoid for starting.the steelwire drops voltage .try using volt meter when car is running ,if voltage drops when stalled wire is your problem.

wolf65

12 years ago

My Dad suggested the resistor wire as well, but the '72 does not have one. He had a '65 GTO year ago and said that didn't have one either. Did GM maybe quit using the one on the firewall because of this problem? No idea. Thanks for your response, I appreciate it. Any other suggestions?

retiredpartsman

12 years ago

the next time you have the problem try hot wire from battery to key side of coil if car starts the ign ballast resistor or resisyor wiire is defective. cannot remember which your car has.gm used a steel wire as a resistor in the 60s and wire would sometimes break and only seperste when warm.

wolf65

12 years ago

Thanks for your response, 23dodges10. I'm new to this site, so hope I'm responding correctly. The grand prix does not have a hei and it does turn over when it quits.

23dodges10

12 years ago

Does this car have the hei distributor? If so my money is on the rotor or the control module. When it stalls does it turn over? If it turns over the starter is not a issue.