Fuel Injector: Service and Repair

WARNING: Do not smoke during the work. Keep open flames away from your work area.

1. Relieve fuel pressure .
2. Remove the intake manifold covers.
3. Disconnect the connectors from the fuel injectors and the IAT sensor.
4. Place a rag or shop towel over the vacuum hose and fuel return hose, then disconnect them from the fuel pressure regulator.
5. Disconnect the fuel hose from the fuel rail.
6. Remove the retainer nuts from the fuel rail and harness holder.
7. Disconnect the fuel rail.




8. Remove the fuel injectors from the intake manifold.
9. Slide new cushion rings onto the fuel injectors.
10. Coat new O-rings with clean engine oil, and put them on the fuel injectors.
11. Insert the fuel injectors into the fuel rail first.
12. Coat new seal rings with clean engine oil, and press them into the intake manifold.




13. To prevent damage to the O-rings, install the fuel injectors in the fuel rail first, then install them in the intake manifold.




14. Align the center line on the connector with the mark on the fuel rail.
15. Install and tighten the retainer nuts.
16. Connect the fuel hose to the fuel rail.
17. Connect the vacuum hose and fuel return hose to the fuel pressure regulator.
18. Install the connectors on the fuel injectors and the IAT sensor.
19. Install the intake manifold covers.
20. Turn the ignition switch ON, but do not operate the starter. After the fuel pump runs for approximately two seconds, the fuel pressure in the fuel line rises. Repeat this two or three times, then check whether there is any fuel leakage.