Fuel Injector: Service and Repair

Injector 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 Service and Repair.

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

3. Disconnect the connectors (A) on the injectors, the fuel temperature sensor, the MAP sensor, and the rocker arm oil control valve.





4. Remove the wire harness clips (B).

5. Remove the nut (C) and the fuel feed hose (D).

6. Remove the fuel rail mounting nuts (E) from the fuel rail (F).

7. Remove the screws (G) and the injector clips (H) from the fuel rail.

8. Remove the injector covers (I) from the injectors.

9. Install the injector covers (A).





10. Coat the new O-rings (B and C) with silicone oil or polyalkyleneglycol (PAG) oil, then insert the injectors (D) into the fuel rail (E).

11. Install the injector clips (F) and the screws (G).

12. Install the fuel rail and the injectors into the cylinder head (H).

13. Install the fuel rail mounting nuts.

14. Connect the fuel feed hose with a new O-ring (I), then install the nut (J).

15. Connect the connectors on the injectors, the fuel temperature sensor, the MAP sensor, the rocker arm oil control valve, and the harness clips.

16. Do the leak inspection procedure Testing and Inspection.

17. Install the cowl cover and the under-cowl panel Service and Repair.