Discovery II
FUEL DELIVERY SYSTEM - V8
19-2-6
DESCRIPTION AND OPERATION
Fuel pump, regulator and fuel gauge sender
1 Electrical connector
2 Fuel feed pipe coupling
3 Pump feed pipe
4 Fuel regulator return pipe
5 Fuel gauge sender unit
6 Float
7 Gauze filter
8 Swirl pot
9 Pump electrical connections
10 Pump
11 Spring 2 off
12 OBD pressure sensor (NAS vehicles with
vacuum type EVAP system leak detection
capability only)
13 Fuel pressure regulator
14 'O' ring
15 'O' ring
The fuel pump is a 'self priming' wet type pump which is immersed in fuel in the tank. The fuel pump operates at all
times when the ignition switch is in position II. If the engine is not started, the ECU will 'time-out' after 2 seconds and
de-energise the fuel pump relay to protect the pump. The pump receives a feed from the battery via fuse 10 in the
engine compartment fusebox and the fuel pump relay. The relay is energised by the ECM when the ignition switch is
moved to position II.
The fuel pump is retained with a locking ring and sealed with a rubber seal. The locking ring requires a special tool
for removal and fitment. An access panel for the fuel pump is located in the loadspace floor below the loadspace
carpet. The access panel is sealed to the floor with a rubber seal and retained by six self-tapping screws.
The fuel gauge sender is integral with the fuel pump. The sender is submerged in the fuel and is operated by a float
which moves with the fuel level in the tank.