Fuel Pressure Regulator Replacement

Fuel Pressure Regulator P1 Replacement

WARNING
Compressed natural gas is flammable and highly explosive. You could be killed or seriously injured if leaking natural gas is ignited.
Stop the engine, and keep heat, sparks, and flames away.

1. Relieve fuel pressure between the engine and the manual shut-off valve. Fuel Pressure Relieving - Between The Engine and The Manual Shut-off Valve

2. Drain the engine coolant. Service and Repair

3. Remove the cowl cover and the under-cowl panel. Service and Repair

4. Remove the fuel pressure regulator protector (A).

5. Remove the fuel feed hose (B), then disconnect the hoses (C) and the fuel line (D).
NOTE: Always use two wrenches when removing or installing the fuel line nuts. Testing and Inspection

6. Disconnect the connectors (E), then remove the bolts (F) and the nut (G).

7. Raise the vehicle on a lift.

8. Remove exhaust pipe A. Service and Repair






9. Remove the heat shield (A).






10. Remove fuel pressure regulator P1 (A) from the bracket (B).






11. Move fuel pressure regulator P1 (A) as shown.






12. Remove fuel pressure regulator P1 (A).






13. Remove the stay (A).

14. Install fuel pressure regulator P1 in the reverse order of removal. Be careful not to deform any of the lines, and assemble them securely when you reinstall the heater hoses.
NOTE: Apply silicone oil or polyalkyleneglycol (PAG) oil to a new O-ring and the fuel pressure regulator. Service and Repair

15. Refill the radiator with engine coolant. Service and Repair

16. Do the leak inspection procedure. Testing and Inspection