This Freestar keeps eating coil packs. The original Motorcraft one lasted 100k miles almost and when removed had cracks in the bottom and on the top. So my friend replaced it and we thought all would be ok. NOPE, it went again THREE more times. The last time he replaced it we sealed up everything as per the Ford TSB for the PCM getting wet (it wasn't). So it again went. He used the Wells brand from Autozone. Do you think the PCM is indeed bad or maybe the coils are just junk? The plug wires and plugs have not been changed, but I didn't think this could be the issues since it ran perfect with the new coil?