Section 2.34
Fuel Pressure Sensor

The Fuel Pressure Sensor (FPS) is installed into the secondary fuel filter. The FPS is not used in all applications. The FPS sends an electrical signal to the ECM telling it what the engine fuel pressure is at any given speed. ‪

On Series 60G engines with the high pressure fuel system the fuel pressure sensor is installed in a tee at the inlet to the low pressure regulator. See Figure "Fuel Pressure Sensor for Series 60G" .‪

Figure 1. Fuel Pressure Sensor for Series 60G

Section 2.34.1
Replacement of Fuel Pressure Sensor

The FPS is non-serviceable and should be replaced as a unit. No adjustment is required.‪

Section 2.34.2
Removal of Fuel Pressure Sensor

Remove the FPS as follows:‪

1. Disengage the locking tang on the three-wire connector. Grasp the body of the connector and gently pull it free of the FPS.
2. Use the appropriate wrench on the hex end of the FPS to unscrew it from the filter.

Section 2.34.3
Installation of Fuel Pressure Sensor

Install the FPS as follows:‪

1. Use Loctite® Pipe Sealant with Teflon, PT-7260 (or equivalent) on all but the first two threads of the FPS to prevent leaks.
2. Screw FPS into the filter.
3. Engage locking tang.
4. Turn the ignition to the ON position. Observe the DDR for any diagnostic code(s). If any code(s) other than code 25 is logged, refer to the Detroit Diesel Single ECM Troubleshooting Manual (6SE497).