Help!!! Ecm/fuel Fuse Keeps Blowing!

1992 Pontiac Grand Prix 3.1, 3spd...umm...i dont really know what is causing this error...it just started happening...it stopped for a while after i replaced it...but now it happens EVERY TIME I TURN OFF THE KEY!...only then does it blow...im stumped guys...it only happens when you turn off the ignition...ive checked the grounds to the tranny since i had it replaced...i really dont know...any help would be appreciated!

Try running a separate ground from the ECM to the Subframe. If that doesn't help, you may have water intrusion in the ECM and it will need to be replaced.

k i will try that out...i replaced the fuel pump last year....im gonna trace those wires out n make sure nothing is touching...but i dont know if thats why it does it when u turn off the ignition...keep comin with idea's guys...i need to get this resolved...

The only thing I can think of is that it's backfeeding ground through some ignition controlled circuit's positive side, and when you cut the switch it loses ground, arcs and pops the fuse.