LR3/Disco 3
Each fuel rail maintains a constant fuel pressure of 4.5bar (65 psi). Four fuel injectors are installed in each injector
housing and are connected to the fuel rail. 'O' ring seals are used to seal the injectors in the fuel rails and inlet manifold. A
'Cooper' style fitting is used to connect the fuel jump hose to the LH fuel rail.
A fuel pressure accumulator is attached to each of the fuel rails and a Schraeder valve is installed in the front end of the
LH fuel rail to provide a pressure test connection for maintenance.
FUEL PRESSURE ACCUMULATOR
A fuel pressure accumulator is attached centrally to each of the fuel rails. The accumulators act as a damper to damp
pulses from the pump and ensure that the fuel pressure in the rail and to the injectors is constant.
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 two wires. For additional information, refer to
Electronic Engine Controls
(303-14B Electronic Engine
Controls - 4.4L)
INJECTORS
Eight, top fed, eight hole, fuel injectors are installed in the fuel rails. Two 'O' rings seal each injector to the manifold
interface and should be renewed whenever an injector is refitted to an engine. A small amount of engine oil can be
Item Part Number
Description
1
-
RH fuel rail
2
-
Fuel supply cross over pipe
3
-
Fuel temperature sensor
4
-
Fuel jump hose
5
-
Cooper fitting
6
-
Fuel pressure accumulators
7
-
LH fuel rail
8
-
Injectors (8 of)
