Rotor keeps going out!!!

[mastx]

I got a 350 with electronic ignition. I had everything done new back in February. Back about six weeks ago, my truck wouldn't start. I found no spark, so I replaced the control module and the rotor (white cover type thing under the distributor cap). I'm not not sure which was bad, but replacing both seemed to fix the problem.

It did it again on Friday, but this time, I had the control module tested and it was good, so all I had to do was replace the rotor. Well, it did it again today(3 days later).

Is there something that could be making my rotor burn out prematurely??

Any ideas or suggestions, good or bad are greatly appreciated.

Thanks

Mario