B1D Checking the Fuel Pump Delivery Pressure

B1D Checking the fuel pump delivery pressure

Start the pump by setting the switch to "ON". Pinch the return line closed momentarily.

CAUTION: The pressure must not exceed 6.0 bar (83 psi).

There should be an immediate noticeable rise in the line pressure.

Insufficient delivery pressure:
- Check that the voltage across the fuel pump terminals is at least 11.5 V.
- Check that the fuel lines are not pinched or blocked.
- Check that the fuel filter is not clogged.

Note: If the fuel filter has been fitted the wrong way round it cannot be refitted but must always be replaced by a new one.

- Check the relief valve in the pump. If it is defective, fit a new pump.