I have had this issue going on for a while now and cant figure out whats going on. Both trailing coils are Getting damaged somehow. Im running factory ignitor with a haltech E6K. I have an MSD 6A on the Leading between the Ignitor and the coil and on the trailing im going straight from the ignitor to the coils through my own wiring. I ran a signal wire directly from the ignitor to the trailing coils and just used the factory power wire for 12v power. here is the final outcome. Both coils fry and the trailing in the ignitor goes bad.

Any ideas!?!

 

You got something screwed up.
The only time something like that happens is when the coils are being gounded consistently while power is on. Basically the coils never turn off. You either have something messed up in the wiring or a damaged igniter/ecu. Check your wiring becuase the signal/trigger wire is either pulling to ground or getting 12v positive.
You should post this in the engine management section.