Fuel Injector: Service and Repair

WARNING: Do not allow smoking or the use of open flames in the area where work on the fuel system is taking place. Anytime the fuel system is being worked on, disconnect the negative battery cable, except for those tests where battery voltage is required.

WARNING: Any time the fuel system is opened for service, the O-ring seals used with related components must be replaced.


NOTE: Use care in removing injectors to prevent damage to the electrical connector pins on the injector and the nozzle. The fuel injector is serviced as a complete assembly only. Since it is an electrical component, it should not be immersed in any type of cleaner. Support the fuel rail to avoid damaging other components while removing the injector.

Disconnection Of Fuel Line Fitting At Regulator.:

Fuel Injector Retaining Clip.:

FUEL INJECTOR ASSEMBLY REMOVAL


1. Remove fuel rail.

2. Slide injector retainer clip off injector. Refer to FUEL RAIL REPLACEMENT procedure.
NOTE: Clean the fuel rail prior to removing the injector.
NOTE: Some DOHC (LLO) engines built prior to January 1, 1991 used the first design slip. Whenever the injector(s) are removed, all four clips (P/N 21007022) must be replaced to prevent a possible injector ticking noise.


3. Remove port fuel injector assembly and plug the injector port with a clean shop towel.


4. Remove injector O-rings and discard.

INSTALLATION

1. Lubricate new injector O-ring seals with clean engine oil and install on injector assembly.

2. Install port fuel injector assembly into fuel rail, with injector's electrical connector facing upward.

3. Slide fuel injector retainer clip and engage on injector.

4. Install fuel rail assembly. Refer to FUEL RAIL REPLACEMENT procedure.