I had a brand new (2 month old) coil short out
It was on my G/Fs car, 2.8 Chevy Corsica. Kept intermittently blowing fuses. I tracing the wiring a dozen times, no shorts when cold, and I never got to check it hot, or right after a fuse blew. I finally put a 5 amp higher circuit breaker in place of the fuse, and it would pop now and then, but start right back up. Then finally the module went out, and I was able to nail it down to that da** new coil.