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Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Fuel Charging & Controls - TDV6 3.0L Diesel -- Range Rover/L405) >> Fuel Charging And Controls - TDV6 3.0L Diesel >> Fuel Charging And Controls (Description And Operation) >> Description And Operation >> Operation >> High Pressure (Hp) Fuel Pump

High Pressure (Hp) Fuel Pump

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

When the HP fuel pump is rotated, pressure is created when the fuel metering valve is open and the fuel rail PCV is closed. Both valves are electronically controlled by the ECM to allow variable fuel delivery and pressure control. When the ECM actuates the fuel injectors, the fuel rail pressure drop is off-set by additional fuel being delivered to the fuel rails by the fuel rail PCV. The fuel pressure in the system is reduced within a few seconds after the engine has stopped as the fuel rail PCV no longer has the holding current it requires, and therefore opens. No residual pressure remains in the system and the fuel is released into the LP fuel return line through the open fuel rail PCV.

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