Fuel Injector: Service and Repair

REMOVAL PROCEDURE

NOTE: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals, the injector filter, and the fuel nozzle.

The fuel injector is serviced as a complete assembly only.

Also since the injectors are electrical components, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur.

1. Disconnect the negative battery cable. Refer to Battery Disconnect Caution.
2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
3. Remove the Upper Manifold Assembly. Refer to Engine Mechanical.
4. Remove the Fuel Meter Body Assembly. Refer to Fuel Meter Body Assembly

DISASSEMBLE PROCEDURE
1. Disassemble the lower hold down plate and nuts.
2. While pulling the poppet nozzle tube downward, push with small screwdriver down between the injector terminals until the injector is removed.

ASSEMBLE PROCEDURE

IMPORTANT: Each injector is calibrated for a specific flow rate. When replacing fuel injectors, order the correct injector for the application being serviced.

1. Lubricate the new injector O-ring seals with clean engine oil.
2. Install on the injector assembly.
3. Assemble the Central SFI fuel injector assembly into the fuel meter body injector socket.
4. Assemble the lower hold down plate and nuts. Tighten the nuts to 3.0 Nm (27 lb. in.).

INSTALLATION PROCEDURE
1. Install the fuel meter body assembly. Refer to Fuel Meter Body Assembly
2. Install the upper manifold assembly. Refer to Engine Mechanical.
3. Connect the negative battery cable.