That fuse powers the PCM to supply the 5v necessary for all of the sensors that are monitored by the PCM. If the fuel pump runs continuously with the key on engine off, the fuse is either blown or you have fried the PCM. Locate the problem!!!!! Don't keep replacing the fuse or you will fry the PCM.
The sensors include the cam, crank, tps, map,engine coolant, engine air temp and trans sensor.
Check the routing of all the wires to those sensors and pay close attention to the o2 wire routing near the exhaust manifold. Many guys don't route the wires back to their original place when replacing parts.