Fuel Injector: Service and Repair

Fuel Injector Removal and Installation

Reference: Fuel Injector On-Vehicle Inspection

WARNING: Before starting the following procedure, be sure to observe Precautions on Fuel System Service in order to reduce the risk of fire and personal injury.

Removal
1. Relieve fuel pressure according to Fuel Pressure Relief Procedure.
2. Disconnect negative cable at battery.
3. Remove air cleaner case and air suction hose referring to Air Cleaner Assembly Removal and Installation.
4. Disconnect fuel injector couplers.
5. Disconnect fuel feed hose (4) from fuel delivery pipe (1).
6. Remove fuel delivery pipe bolts (2).




7. Remove fuel injector(s) (3).

Installation

Reference: Fuel Injector Inspection

Reverse removal procedure for installation noting the following.
^ Replace injector O-ring (1) with new one using care not to damage it.
^ Check if cushion (2) is scored or damaged. If it is, replace with new one.
^ Apply thin coat of fuel to O-rings (1), and then install injectors (3) into delivery pipe (4) and cylinder head.
Make sure that injectors rotate smoothly (6). If not, probable cause is incorrect installation of O-ring. Replace O-ring with new one.




^ Tighten delivery pipe bolts (5) to specified torque and make sure that injectors rotate smoothly.

Tightening torque
Fuel delivery pipe bolt a: 25 Nm (2.5 kgf-m, 18.0 ft. lbs.)

^ After installation, with engine OFF and ignition switch ON, check for fuel leaks around fuel line connection.