Isuzu Trooper>> Fuel system>> The mechanical fuel pump

5.3. The mechanical fuel pump


The fuel pump and drive bar

1 – a camshaft

2 – a drive bar

3 – the pump lever

The fuel pump is mounted in the right part of a motor compartment, directly under a soaking up collector.


1. Depressurize fuel system.
2. Disconnect the battery from weight.
3. Remove the air filter.
4. Remove soaking up collector.
5. Disconnect gasoline pipe line tubes on the fuel pump and muffle.
6. Turn away bolts of fastening of the fuel pump and remove the pump.


1. Uncover heads of cylinders.
2. Turn a cranked shaft and establish the piston of 4th cylinder in ВМТ a compression step.
3. Extend a bar of a drive of the fuel pump towards a camshaft and keep.
4. Establish a new lining and the pump, tighten bolts of fastening with the moment 20–34 Н.м.
5. Attach gasoline pipe line tubes to the fuel pump.
6. Establish the air filter.
7. Connect the battery to weight.
8. Start the engine, be convinced of absence of a leak.


1. Remove the fuel pump.
2. Check up a condition external survey. At detection of cracks, подтеканий and other signs of an abnormal condition the pump replace.
3. Check up deterioration of the lever of a drive of the pump and a camshaft cam.
4. Check up the inlet valve for what press the lever and keep in this position. Close fingers a final aperture of the pump and an aperture of a return gasoline pipe line, release the lever. At returning in a starting position, a lever free wheeling should increase. Otherwise the pump replace.
5. Check up the final valve of the pump. For what close fingers an inlet aperture of the pump. At the closed aperture the lever should not to move. The big efforts not to apply.
6. Check up a pump diaphragm. For what close final both inlet apertures of the pump and an aperture of a return gasoline pipe line. At the closed apertures the lever should not to move. Otherwise the pump replace.