Hi i have a 1993 chevy truck half ton. TBI, i have no spark, and my fuel pump won't come on. It won't even prime. Anyways i have replaced the Ignition control module, the coil, and checked all fuses, even the fuel pump fuse...there all good. Any suggestions? Im thinking the ECM took a dumb. I tested from jumper AtoB turend the key on and i got no codes...does this mean the ecm is bad? Im lost... it just died completly while driving.