Fuel Injector: Service and Repair

1. Relieve fuel pressure.
2. Disconnect the connectors from the fuel injectors (A), the EGR valve (B) and the EVAP purge control solenoid valve (C).
3. Disconnect the vacuum hoses and fuel return hose from the fuel pressure regulator (D) and EVAP purge control solenoid valve. Place a rag or shop towel over the hoses before disconnecting them.
4. Disconnect the fuel hose (E) from the fuel rail (F).
5. Remove the retainer nuts (G) from the fuel rail and harness holder (H).
6. Remove the EVAP purge control solenoid valve, and disconnect the PCV valve (I).
7. Disconnect the fuel rail.
8. Remove the fuel injectors from the fuel rail.




9. Slide new cushion rings (A) onto the fuel injectors (B).
10. Coat new O-rings (C) with clean engine oil, and put them on the fuel injectors.
11. Insert the fuel injectors into the fuel rail (0) first.
12. Coat new seal rings (F) 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. Install and tighten the retainer nuts.
15. Connect the fuel hose to the fuel rail with new washers.
16. Connect the vacuum hoses and fuel return hose to the fuel pressure regulator and EVAP purge control solenoid valve.
17. Install the connectors on the fuel injectors EGR valve and EVAP purge control solenoid valve.
18. Install the EVAP purge control solenoid valve and PCV valve.
19. Turn the ignition switch ON (II), 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.