Fuel Injector: Service and Repair

FUEL INJECTOR

Removal
1) Relieve fuel pressure according to procedure described in Fuel Pressure Release.
2) Disconnect battery negative cable at battery.
3) Disconnect fuel injector couplers.
4) Disconnect vacuum hose from fuel pressure regulator.





5) Remove fuel delivery pipe bolts.
6) Remove fuel injector(s).

CAUTION: A small amount of fuel may come out after removal of fuel injectors, cover them with shop cloth.

Installation
For installation, reverse removal procedure and note following precautions.
- Replace injector 0-ring with new one using care not to damage it.
- Check if cushion is scored or damaged. If it is, replace with new one.
- Apply thin coat of fuel to O-rings and then install injectors into delivery pipe and intake manifold.
Make sure that injectors rotate smoothly. If not, probable cause is incorrect installation of O-ring. Replace O-ring with new one.





- Tighten delivery pipe bolts and make sure that injectors rotate smoothly.
- After installation, with engine "OFF" and ignition switch "ON", check for fuel leaks around fuel line connection.