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 injector.

Remove the fuel rail with the injectors attached to it.

INSTALLATION SERVICE POINTS

]]A[[
FUEL INJECTOR ASSEMBLY 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 injector to the right and left to install to the fuel rail. Be careful not to damage the O-ring. After installing, check that the item turns 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 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 retainer of fuel high-pressure hose to unlock before installing.





2. Install the fuel high-pressure hose to the fuel rail securely and push the retainer 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.