Okay, my 89 GMC Jimmy TBI 4.3 sawed-off six (8062 ecm) keeps blowing the 10 amp ECM-B fuse. I don't have a chilton's manual for this truck and the Haynes manual shows it in the fuse block, but doesn't even give me a clue as to its purpose. Basically, it won't start. It turns over, but isn't injecting fuel, and the fuel pump doesn't prime when you turn the ignition on as far as I can tell (I could never really hear the thing anyway). I searched on this one and only found one reference in the boards to the ECM-B fuse, but it did not give any details about it. Any ideas what could be happening here?

Later,
Harry