I have a 1996 Ford F250 5.0 with 147,000 miles. When trying to start, the fuel pumps will not cut on and is not firing. I have replaced the module, crank sensor, ignition switch, distributor, and ECM. I have checked the pickup coil, coil, all fueses and relays, and have reset the relay switch for the fuel pumps. Do you know what else I can check for fix?