Fuel Injector: Service and Repair

1. Relieve fuel pressure.
2. Remove the intake manifold covers and the intake manifold.
3. Disconnect the connectors from the fuel injectors (A).
4. Disconnect the vacuum hose and fuel return hose from the fuel pressure regulator (B). Place a rag or shop towel over the hoses before disconnecting them.
5. Disconnect the fuel hose (C) from the fuel rail (D).
6. Remove the retainer bolts (F) from the fuel rails and harness holders (F), then replace the O-rings (G).
7. Disconnect the fuel rails.
8. Remove the fuel injectors from the fuel rails.




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 rails (D) 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 rails first, then install them in the intake manifold.
14. Install and tighten the retainer bolts.
15. Connect the fuel hose to the fuel rail with new washers.
16. Connect the vacuum hose and fuel return hose to the fuel pressure regulator.
17. Install the connectors on the fuel injectors and harness holders.
18. Install the intake manifold and the intake manifold cover.
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 for fuel leakage.