Fuel Injector(s) Replacement

Multi-Port Fuel Injector:

WARNING: To reduce the risk of fire and personal injury that may result from a fuel leak, always replace "O" ring seals exposed during component service.

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.

REMOVAL:

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. See MAINTENANCE PROCEDURES/FUEL SYSTEM PRESSURE RELIEF.
3. Remove the fuel rail assembly from the head. See COMPONENT REPLACEMENT AND REPAIR PROCEDURES/FUEL RAIL ASSEMBLY procedure.
It is not necessary to separate the fuel rail from the fuel pipes.

Injector Part Number Location:

Fuel Rail Assembly:

DISASSEMBLY:


1. Remove the injector retainer clip and discard.
2. Remove the MPFI injector assembly.
3. Remove the injector "O" ring seals from both ends of the injector, and discard.

NOTE: Different injectors are calibrated for different flow rates. When ordering new fuel injectors, be sure to order the identical part number that is inscribed on the old injector.

ASSEMBLY:

1. Lubricate the new injector "O" ring seals with clean engine oil, and install on the injector assemblies.
2. Insert the new injector retainer clip on the injector assembly.
^ Position the open end of the clip so that it is facing the injector electrical connector.
3. Position the MPFI injector assembly into the fuel rail injector socket, with the electrical connector facing outward.
^ Push the injector assembly in far enough to engage the retainer clip with the machined slots on the rail socket.

Fuel Rail Assembly Removal:

INSTALLATION:

1. Install the fuel rail assembly. See COMPONENT REPLACEMENT AND REPAIR PROCEDURES/FUEL RAIL ASSEMBLY procedure.
2. Connect the negative battery cable.
3. With the engine "OFF" and the ignition switch "ON" check for fuel leaks.