Well gee wiz, i pulled the tail panel out and found a grounded out bulb wire that was wound up around one of the screw posts making contact with the body metal. LOL ! What a cluster. Strange though with the initial knock sensor code and no voltage, fuel pump fuse and tail light fuses popping. Thats why i had though the pcm was fried because of the metal from my air filter shield cutting into the pcm harness. Oh well, got a spare pcm now, lol.