Before and while replacing the fuel injector and rail assembly, ensure that the electrical harness pins are not damaged as well as when removing the fuel injectors the nozzle is not damaged. The injectors should be serviced only as an assembly and must not be submerged in any cleaner. The lock threads of each injector are protected by replaceable O-rings; the O-rings should therefore be changed each time the injectors are removed. This is because there is a likelihood of causing fires from the spilt fuels when disconnecting pressure regulator a Injector connections, the engine has to be cold and no light sources. Start with the draining the pressure of the fuel then remove the connector of the injectors, the pressure line of the fuel rail and in addition the vacuum and fuel return line of the
Fuel Pressure Regulator. Subsequently, take out the fuel rail mounting bolts and gently pull the rail straight in the upward position with a view of pulling out the injectors from the manifold. Pump any fuel out of the rail into a metal container, if the injectors have clips on them, then remove the clips, and taking hold of the injector snap turn them out of the fuel rail. For installation, invert the procedure used for removal always making sure to reinstall all O-rings before tightening the nuts and bolts and throughout the process of reinstallation always make sure to apply engine oil on them so as to avoid damaging them.