I installed a new PCM (tuned by nelson) for a 3000 rpm stall. I disconnected the negative side of the battery, installed the pcm and reconnected the negative side of the battery. About 30 miles later/5 on and off key cycles, while driving, I hit a bump and the engine turned off, everything else still had power to it (head lights, dash lights, radio, etc)

I got out and checked over everything to find a blown PCM fuse. I replaced it and drove home without any problems (so far)

 

fuel pumps that are on the way out blow the pcm/b fuse on that model I THINK...

 

hmm, I have a walbro- but I still have the stock wiring going to it. I wonder if I just over loaded it? As I did do about 5 short WOT runs 20 minutes before it blew

 

Looked at the schematic for the vehicle in your sig. Sure nuff, the pcm/b fuse does feed the fuel pump along with some other stuff. I have seen many stock pumps start to die and take out that fuse. happy hunting.

 

You could get a racetronix hot wire kit.....that should fix it.