I have a 1987 k5 blazer. The person who owned the vehicle before me accidentally hooked the battery terminals up backwards and may have shorted something out. I started the vehicle and drove it to the gas station. When I tried to turn it over again it wouldn't fire. The starter sounded as though it wasnt drawing enough power so I checked and it was pulling 12 volts. I replaced the battery, the alternater and the computer. The truck fired ran for approximately 10 minutes and quit again and will not turn over. Should I replace the distributor too? Or the wire harness? I checked the fuses and none were burnt. Could it be the fuel pump?