Content .. 623 624 625 626 ..

Nissan Altima L32. Manual - part 625

EM-36

< ON-VEHICLE REPAIR >

[QR25DE]

FUEL INJECTOR AND FUEL TUBE

FUEL INJECTOR AND FUEL TUBE

Removal and Installation

INFOID:0000000004202120

CAUTION:

• Apply new engine oil before installing the parts, as shown above.

• Do not remove or disassemble parts unless instructed as shown.

REMOVAL

1. Remove engine room cover using power tool.
2. Release the fuel pressure. Refer to

EC-550, "Inspection"

(California),

EC-1038, "Inspection"

(Except Cali-

fornia).

3. Remove the front air duct. Refer to

EM-25, "Removal and Installation"

4. Disconnect the fuel hose quick connector at the fuel tube side.

CAUTION:

• Prepare a container and cloth for catching any spilled fuel.

• This operation should be performed in a place that is free from any open flames.

• While hoses are disconnected seal their openings with vinyl bag or similar material to prevent

foreign material from entering them.

5. Remove the intake manifold. Refer to

EM-26

AWBIA0077ZZ

Fuel tube protector

Fuel tube

Upper O-ring (black)

Clip

Fuel injector

Lower O-ring (green)

Intake manifold adapter

A. Follow installation procedure

FUEL INJECTOR AND FUEL TUBE

EM-37

< ON-VEHICLE REPAIR >

[QR25DE]

6. Disconnect sub-harness for injector at engine front side, and remove it from bracket.
7. Loosen the bolts in the reverse order shown, then remove fuel

tube and fuel injectors as an assembly.

8. Remove the fuel injectors from the fuel tube.

• Release the clip and remove the fuel injector.

• Pull fuel injector straight out of the fuel tube.

CAUTION:

• Be careful not to damage the nozzle.

• Avoid any impact, such as dropping the fuel injector.

• Do not disassemble or adjust the fuel injector.

INSTALLATION

1. Install new O-rings on the fuel injector, the fuel side black O-ring and the nozzle side green O-ring.

CAUTION:

• Upper and lower O-rings are different. Be careful not to confuse them.

- Fuel tube side: black O-ring

- Nozzle side: green O-ring

• Lubricate the O-rings lightly with new engine oil.

• Handle O-rings with bare hands only. Do not wear gloves.

• Do not clean O-rings with solvent.

• Make sure that O-ring and its mating part are free of foreign material.

• Be careful not to scratch O-rings during installation.

• Do not twist or stretch the O-ring. If the O-ring was stretched while it is attached, do not insert it

into the fuel tube immediately.

2. Install the fuel injector (5) into the fuel tube (1) with the following

procedure:

• Do not reuse the clip (3), replace it with a new one.

• Insert the new clip (3) into the clip mounting groove (F) on fuel

injector (5).

• Insert the clip (3) so that projection (E) of fuel injector (5)

matches notch (C) of the clip (3).

• Fuel tube side: black O-ring (2)

• Nozzle side: green O-ring (4)

3. Insert fuel injector (5) into fuel tube (1) with clip (3) attached.

• Insert it while matching it to the axial center.

• Insert fuel injector (5) so that projection (A) of fuel tube (1)

matches notch (B) of the clip (3).

• Make sure that fuel tube flange (G) is securely fixed in flange

fixing groove (D) on the clip (3).

• Make sure that installation is complete by checking that fuel

injector (5) does not rotate or come off.

4. Install fuel tube assembly.
a. Insert the tip of each fuel injector (5) into intake manifold.

ALBIA0188ZZ

AWBIA0078ZZ

EM-38

< ON-VEHICLE REPAIR >

[QR25DE]

FUEL INJECTOR AND FUEL TUBE

b. Tighten the bolts in two steps in the numerical order as shown.

CAUTION:

After properly connecting fuel tube assembly to injector

and fuel hose, check connection for fuel leakage.

5. Install the intake manifold. Refer to

EM-26, "Removal and Installation"

6. Connect the fuel hose quick connector.
7. Installation of the remaining components is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

Make sure there is no fuel leakage at connections as follows:
1. Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel

leaks at connections.

2. Start the engine and rev it up and check for fuel leaks at connections.

• Perform procedures for “Throttle Valve Closed Position Learning” after finishing repairs. Refer to

EC-29,

"THROTTLE VALVE CLOSED POSITION LEARNING : Description"

(California),

EC-565, "THROTTLE

VALVE CLOSED POSITION LEARNING : Description"

(Except California).

• If electric throttle control actuator is replaced, perform procedures for “Idle Air Volume Learning” after

finishing repairs. Refer to

EC-30, "IDLE AIR VOLUME LEARNING : Description"