2000 Alero Blowing up coils

[bnuts1014]

I have a 2000 alero 2.4l i was driving down the road and all of the sudden pop! and then stalled out. it was like i had a spike in my coil because it blew apart the inside of the coil pack housing. Replaced coil pack car ran fine for four days and then same thing happened!!! replaced ignition modual lasted 4 more days hit passing gear and once again same thing?!?!? changed out coil packs, coil pack housing boots and plugs also igniton modual all new from GM still wont start multi testor say's crank pos sensor so i replaced that now starter is bad and car wont run damnit help!!!!!!!!!???