Removal Procedure
- Relieve the high side fuel system pressure. Refer to
Fuel Pressure Relief.
- Disconnect the fuel injector wiring harness electrical connector (1) from the fuel injection fuel rail fuel pressure sensor.
Note: Do NOT reposition the foam insulator as damage to the insulator may occur.
- Insert a 27 mm socket through the opening in the foam insulator (2) onto the fuel injection fuel rail fuel pressure sensor (1).
Note: Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached hexagon.
- Place a clean shop towel under the fuel injection fuel rail pressure sensor to fuel rail location.
- Remove and discard the fuel injection fuel rail fuel pressure sensor (1).
- Allow any fuel to drain from the fuel rail and pressure sensor location.
- Dry the sealing cone in the fuel rail and the area around the sensor joint with a lint free cloth.
- Inspect the sealing cone in the fuel rail. The surface should be free of fuel, debris, and burrs.
Installation Procedure
Note: Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached hexagon.
Note: Ensure that the fuel rail threads have been cleaned of any excess fuel, or the NEW fuel injection fuel rail fuel pressure sensor will NOT seal properly.
- Lubricate the threads and the sealing cone in the fuel rail with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
- Lubricate the threads and sealing cone on the NEW fuel injection fuel rail fuel pressure sensor with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
- Install the NEW fuel injection fuel rail fuel pressure sensor hand tight.
- Remove the NEW fuel injection fuel rail fuel pressure sensor, re-lubricate following steps 1 and 2 above.
Caution: Refer to Fastener Caution in the Preface section.
- Install the NEW fuel injection fuel rail fuel pressure sensor (1) and tighten to
33 N·m (25 lb ft).
- Connect the fuel injector wiring harness electrical connector (1) to the fuel injection fuel rail fuel pressure sensor.
- Install a NEW high pressure fuel line. Refer to
Fuel Feed Intermediate Pipe Replacement.
- Install the low side fuel pressure service port cap.
- Tighten the fuel fill cap.
- Inspect for fuel leaks using the following procedure:
10.1. | Place a sheet of paper towel in between the bottom of the sensor and the top of the generator. |
10.2. | Start the vehicle and allow the vehicle to idle for approximately 5 minutes. |
10.3. | Shut the vehicle off. |
10.4. | Remove the paper towel and inspect the towel for wetting. If wetting is noted repeat steps 1 through 5. |