Fuel Pressure Test (Discovery Series II & Range Rover)
NOTE:
Regulated fuel pressure should be 50 psi (3.5 kg/cm2
) with engine at idle.
Fuel pump delivery pressure and pressure regulator operating pressure can be checked using a Schraeder type valve located at the rear of the engine on the fuel rail. The valve allows the pump delivery pressure to be measured using a suitable gauge and an adaptor and hose. If fuel pressure is not as specified at engine idle, ensure fuel line is not pinched, crushed or damaged and that there are no loose or leaking connections. If fuel lines are okay, replace fuel pump/sending unit assembly.