Fuel Injector: Service and Repair

INJECTOR

REMOVAL AND INSTALLATION

Pre-Removal Operation And Post-Installation Operation:

Removal Steps 1 - 10:

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

REMOVAL SERVICE POINTS

<> FUEL HIGH-PRESSURE HOSE DISCONNECTION

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

1. 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 to the arrowed direction, and lift the retainer to unlock and disconnect the fuel high-pressure hose.

<> FUEL RAIL AND 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

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

1. 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 dose 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

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

1. 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.