miss on grand prix-coil?computer?

i have a 94 grand prix(3.4),miss on no.2 cylinder,first thing i did was pull wire off on the other leg of the shared coil to see if the other cylinder was dead,it was just the one cylinder, spark plug is okay,pulled wire off coil leg and found rust and corrison on leg and inside of wire boot,sanded leg clean and inside of boot ,sounds like moisture and water problem caused by bad boot?) still had miss on that cylinder,changed the wire around with another to troubleshoot wire hoping that the miss would now be on another cylinder proving bad wire ,still miss on no.2,so changed wires back and called a few shops to see if possible one leg was shorted out on the coil pac, caused by the rust and moisture,one shop said highly doubtful-coil will go out all together,sounds like ign.module or computer,another told me it was very possible that the leg shorted out and the other leg on coil was good,tomorrow i guess i will be changing coils around to see if the miss is now on the adjoining cylinders,any other ideas guys??? is it possible that one leg shorted out leaving half a coil still good??the car was running fine then it just happened all of a sudden,it's not like it had been a slight or giving trouble miss,so the corrison must have been building up for awhile,wouldn't the "check engine light have come on tripping a code if the computer had gone bad??i know it won't tripp it for just a bad plug,wire or coil. i;ve gotten a lot of great help here so once again,give me some ideas please??