I've got a 69 442 with almost everything stock. For some reason I've had 4 coils go bad in the last couple months. I figured out that the resistive wire went bad, so I installed an Accell ballast resistor with 1.35 ohms. At first the resistor smoked a little, but still worked. After a week or so the car wouldn't start and I checked everything out and the coil was bad again, and also the resistor became a short, no resistance anymore. Not sure what the problem causing this could be, and any help or ideas would be appreciated.

Thanks

 

That's just weird.
Are you buying one brand / model of coil over and over, or did you mix it up a bit?
Any chance you've got an intermittent short to ground in your distributor?
Have you checked your dwell angle recently?

Way too much dwell would be an obvious answer.

- Eric

 

Have checked the condensor?, as well as burning up points it can hurt the coil if it has gone bad. Normally you would have starting and running issues too, but worth a look IMO.

 

I have tried different types of coils, all were oe replacements that need the external resistor. I don't think I have a short in the distributor, but I'm gonna double check all my grounds. And I will check my dwell I didn't think of that. I have replaced both the condenser on top of the coil and the one inside the distributor.

Thanks!