causes for a pcm to fry? went through 2
My 1996 jeep grand Cherokee stalled out one day and i went through enough trouble shooting to realize it was my pcm that was at fault. i tested for power to it through the black connector and continuity. so i replaced it with a junkyard one that IS COMPATIBLE i have a list of serial numbers of pcms which will plug and play and work with my gc. after i put that in it started up re learned its stuff and it worked fora few days till i was driving down a 4 lane freeway on the left lane and it stalled out (33 mts slow you down verrrrry fast at 70mph, it was a ***** shifting lanes to get to the right) just like it did when my previous pcm failed.
so my question is what causes pcms to fry? i have power going to it. i do realize there is a chance i just had bad luck with a junk pcm, however if i didnt and it was a burst of to much voltage going to my pcm wouldn't a fuse or my asd relay blow and close the circuit to pcm before it gets damaged?
any input helps!