Fuel Charging and Controls (4.2l) Land Rover Range Rover L322

SPECIFICATIONS

GENERAL SPECIFICATION

TORQUE SPECIFICATIONS

Scheme 1

GENERAL

The major components of the fuel charging and control system comprise an outlet duct, a fuel pump and control module, fuel rails and 8 injectors. The fuel pump supplies fuel from the tank, via a pipe routed along the side of the transmission, to the fuel rail. The fuel rail distributes the fuel equally to each of the 8 injectors. The fuel injectors, which are controlled by the Engine Management System (EMS), are installed in the fuel rails on each side of the intercoolers. A cross over pipe connects the two fuel rails together at the front of the engine.

OUTLET DUCT

The outlet duct directs air from the supercharger into the two intercoolers. A filler point for the intercooler coolant system is integrated into the front and right side of the outlet duct. This connection is not used on Land Rover vehicles. A vacuum take-off for the speed control system is located on the right side of the outlet duct. Isolating bolts, to reduce noise, secure the outlet duct to the supercharger and a rubber gasket seals the supercharger to the outlet duct interface.

FUEL PUMP

The fuel pump module is mounted in the fuel tank and delivers fuel at variable flow and pressure to the fuel rails, which supply fuel to all fuel injectors. The fuel pump operation is regulated by a fuel pump control module, which is controlled by the EMS. For additional information, refer to: Fuel Tank And Lines - V8 S/C 4.2L Petrol

THROTTLE BODY

The electronic throttle body controls the engine torque and is located on the induction elbow at the rear of the engine. Its main components are an electronic throttle control valve, Accelerator Pedal Position (APP) sensor and the Engine Control Module (ECM).

The APP sensor determines the driver demand to control throttle opening. This value is received by the ECM and the throttle is then opened to the correct angle by means of an integral electric motor. Sensors in the throttle body are used to determine the position of the throttle plate and the rate of change in its angle.

For additional information, refer to: Electronic Engine Controls

INDUCTION ELBOW

The induction elbow provides the interface between the electronic throttle body and the supercharger. Connections on the induction elbow provide vacuum take off's for various vehicle systems.

Scheme 2

Each fuel rail maintains a fuel pressure of typically 4.5bar (65 psi), however, this pressure will vary depending on engine requirements; lower at idle, higher at full load. Four fuel injectors are installed in each intercooler adapter and are connected to the fuel rail. 'O' ring seals are used to seal the injectors in the fuel rails and the intercooler adapters.

FUEL PRESSURE DAMPER

A fuel pressure damper is attached centrally to each of the fuel rails. The damper acts to damp pulses from the fuel pump.

FUEL TEMPERATURE SENSOR

The fuel temperature sensor is located in the rear of the RH fuel rail. The sensor is an NTC sensor, which is connected to the ECM by 2 wires.

For additional information, refer to: Electronic Engine Controls

FUEL PRESSURE SENSOR

The fuel pressure sensor continuously monitors the fuel pressure in the fuel rail, this value is used by the ECM to calculate the injector pulse-width required to deliver the correct mass of fuel per injection.

The ECM also uses this information to demand a specific fuel flow-rate from the fuel pump via the fuel pump module.

For additional information, refer to: Electronic Engine Controls

INJECTORS

Eight, top fed, 12 hole, fuel injectors are installed in the fuel rails. Two 'O' rings seal each injector to the intercooler adapters and fuel rails and should be renewed whenever an injector is refitted to an engine. A small amount of engine oil can be applied to the 'O' rings to aid installation. No other form of lubrication should be used. The fuel jets from the injectors are directed onto the back of the intake valves.

The injectors are electromagnetic solenoid valves controlled by the ECM. Each injector contains a solenoid-operated needle valve, which is closed while the solenoid winding is de-energized. The solenoid winding is connected to a power feed from the main relay and to an earth through the ECM. The ECM switches the earth to control the opening and closing of the needle valve. While the needle valve is open, fuel is sprayed into the cylinder intake tract onto the back of the intake valves. The ECM meters the amount of fuel injected by adjusting the time that the needle valve is open. For additional information, refer to: Electronic Engine Controls

FUEL RAIL

SPECIAL TOOLS Tool Illustration Tool Name Tool Number Fuel spring lock decoupling tool 310-005

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1. Disconnect the battery ground cable. Refer to «Specifications»(/land-rover/range-rover/l322-2005-2009/remont/charging-system/#charging-system-general-information__specifications) .
2. Raise and support the vehicle.
3. Remove the LH charge air cooler. Refer to «Charge Air Cooler LH»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
4. Remove the RH charge air cooler. Refer to «Charge Air Cooler RH»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
5. Using the special tool, disconnect the fuel line. Release the clip. Position an absorbent cloth to collect fluid spillage.
6. Disconnect the fuel temperature sensor electrical connector.
7. Release the fuel injector harness from the fuel rail. Release the 4 clips.
8. Disconnect the fuel injector electrical connectors. Release the 8 clips.
9. Remove the fuel rail. Remove the 4 Torx screws. Remove and discard the fuel injector O-ring seals.
10. Release and remove the fuel injectors. Remove the 8 clips. Discard the O-ring seals.
11. Remove the fuel pressure sensor. Remove the 2 bolts. Discard the O-ring seals.
12. Remove the fuel temperature sensor.

INSTALLATION

1. Install the fuel temperature sensor. Clean the component mating faces. Apply sealant to the sensor thread. Tighten the sensor to 7 Nm (5 lb.ft).
2. Install the fuel pressure sensor. Clean the component mating faces. Install new O-ring seals. Tighten the bolts to 6 Nm (4 lb.ft).
3. Install the fuel injectors to the fuel rail. Clean the component mating faces. Install new O-ring seals. Secure with the clips.
4. Install the fuel rail and injectors. Clean the component mating faces. Install new O-ring seals. Tighten the Torx screws to 10 Nm (7 lb.ft).
5. Install the injector harness. Secure the clips. Connect the electrical connectors.
6. Connect the fuel temperature sensor electrical connector.
7. Connect the fuel line to the fuel rail. Clean the component mating faces. Secure the clip.
8. Install the RH charge air cooler. Refer to «Charge Air Cooler RH»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
9. Install the LH charge air cooler. Refer to «Charge Air Cooler LH»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
10. Connect the battery ground cable. Refer to «Specifications»(/land-rover/range-rover/l322-2005-2009/remont/charging-system/#charging-system-general-information__specifications) .

REMOVAL

1. Disconnect the battery ground cable. Refer to «Specifications»(/land-rover/range-rover/l322-2005-2009/remont/charging-system/#charging-system-general-information__specifications) .
2. Raise and support the vehicle.
3. Remove the fuel rail. See «FUEL RAIL»(/land-rover/range-rover/l322-2005-2009/remont/fuel-system/#fuel-charging-and-controls-42l) .
4. Remove the fuel injector. Remove the clip. Remove and discard the O-ring seal.

1. To install, reverse the removal procedure. Install the O-ring seal. Lubricate the O-ring seals with clean engine oil.

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Scheme 12

1. Disconnect the battery ground cable. Refer to «Specifications»(/land-rover/range-rover/l322-2005-2009/remont/charging-system/#charging-system-general-information__specifications) .
2. Remove the air intake resonator. Refer to «Intake Air Resonator»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
3. Position the wiring harness aside. Remove the 2 bolts.
4. Remove the throttle body intake. Disconnect the breather line. Release the clip. Release the bushing.
5. Disconnect the throttle position (TP) sensor electrical connector.
6. Release the throttle body. Remove the 4 bolts. Remove and discard the throttle body gasket.

1. Install the throttle body. Clean the components. Install a new gasket. Tighten the bolts to 10 Nm (7 lb.ft).
2. Connect the TP sensor electrical connector.
3. Install the throttle body intake. Align the bushing. Secure the clip. Connect the breather line.
4. Attach the wiring harness. Tighten the bolts to 10 Nm (7 lb.ft).
5. Install the air intake resonator. Refer to «Intake Air Resonator»(/land-rover/range-rover/l322-2005-2009/remont/mechanical/#intake-air-distribution-and-filtering-42l) .
6. Connect the battery ground cable. Refer to «Specifications»(/land-rover/range-rover/l322-2005-2009/remont/charging-system/#charging-system-general-information__specifications) .

See also:
• Fuel Tank And Lines - V8 S/C 4.2L Petrol
• Electronic Engine Controls
• Specifications
• Charge Air Cooler LH
• FUEL RAIL