Fuel Injector: Service and Repair

REMOVAL AND INSTALLATION

CAUTION:
When the fuel injector replacement is performed, use scan tool MB991958 to initialize the learning value Initialization Procedure for Learning Value in MFI Engine).













REMOVAL SERVICE POINTS

[[A]]
FUEL HIGH-PRESSURE HOSE DISCONNECTION





1.
CAUTION:
Do not kink the fuel high-pressure hose as it is made of plastics and will become damaged.

Insert a flat-tipped screwdriver [width 6 mm (0.24 inch), thickness 1 mm (0.04 inch)]
to the retainer.





2. Turn the flat-tipped screwdriver approximately 90 degrees to the arrowed direction, and lift the retainer to unlock and disconnect the fuel high-pressure hose.

[[B]]
FUEL RAIL AND FUEL INJECTOR ASSEMBLY REMOVAL

CAUTION:
Do not drop the fuel injector.

Remove the fuel rail with the fuel injectors attached to it.

INSTALLATION SERVICE POINTS

]]A[[
FUEL INJECTORS/O-RING INSTALLATION

1.
CAUTION:
Do not let the engine oil get into the fuel rail.

Apply a drop of new engine oil to the O-ring.

2. Turn the fuel injector to the right and left to install to the fuel rail. Be careful not to damage the O-ring. After installing, check that they turn smoothly.

3. If it does not turn smoothly, the O-ring may be trapped, remove the item, re-install it into the fuel rail and check again.

]]B[[
FUEL RAIL AND FUEL INJECTOR ASSEMBLY INSTALLATION

CAUTION:
Securely bring the insulator into contact with the injector to prevent air leak from the insulator area.





Be sure that there is no clearance between the insulator area and the injector, and install them to the intake manifold.

]]C[[
FUEL HIGH-PRESSURE HOSE CONNECTION





1.
CAUTION:
Do not kink the fuel high-pressure hose as it is made of plastics and will become damaged.

Pull up the lock of fuel high-pressure hose to unlock before installing.





2. Install the fuel high-pressure hose to the fuel rail securely and push the lock of fuel high-pressure hose downward and lock thoroughly.
3. After installing, slightly pull the fuel high-pressure hose and ensure that there is no disengaged fuel high-pressure hose. Also confirm that there is approximately 1 mm (0.04 inch) play at this time.