Land Rover Series 3
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Last Updated 11/29/06
Series Land Rover Diesel Fuel System - Fault Diagnosis
Outline of the diesel fuel system.
In Series I, II or III Land Rover, fuel is pumped from the tank by the mechanical fuel pump then passes through filters to reach the fuel injection/distributor pump. From here an accurately controlled amount of fuel is sent to the injectors, depending on the engine speed and requirement of the Land Rover. The fuel enters the combustion chambers as a fine spray through the injector nozzles. Air is is pulled into the combustion chambers through the air filter and intake manifold to form the correct fuel/air mixture for efficient combustion.
The injection/distributor pump and fuel injectors require specialist knowledge and equipment to overhaul them.
Land Rover difficult to start
Heater plugs or heater circuit either faulty or not working; error in the timing of fuel injection/distributor pump; air present in fuel system; partially blocked fuel pipes; dirty of wrongly adjusted injector nozzles;
Poor idling or stalling
Slow running control screw not adjusted correctly; error in the timing of fuel injection/distributor pump; worn fuel injectors; wrong adjustment to the injector nozzles; partially blocked injector nozzle; worn fuel injection/distributor pump.
Poor acceleration (even for a Series Land Rover)
When does a Series Land Rover deliver anything different?! But it could be:
an error in the timing of fuel injection/distributor pump; worn or badly adjusted accelerator linkage; worn fuel injectors; worn fuel injection/distributor pump; internal engine overhaul required due to loss of compression, valve leakage etc; check injector nozzle vale seating and that sealing washer is present; check injectors are sufficiently tightened.
Your Series Land Rover has a smokey exhaust
Error in the timing of fuel injection/distributor pump; worn fuel injectors; worn fuel injection/distributor pump; internal engine overhaul required due to loss of compression, valve leakage etc.;
Engine runs erratically
Partially blocked fuel pipes; dirty fuel filter; one or more fuel injectors worn or faulty; worn fuel injection/distributor pump; Error in the timing of fuel injection/distributor pump.