B1E Checking the Fuel Pump Delivery Flow

B1E Checking the fuel pump delivery flow

1 Stop the pump by setting the switch to "OFF". Disconnect the return line at the fuel pressure regulator.

2 Connect one end of the return flow test hose to the fuel pressure regulator and place the other end in the 2-litre graduated beaker.

3 Start the fuel pump by setting the switch to "ON". Allow the pump to run for 30 seconds and then read off the volume of fuel in the beaker. It should be at least 0.9 liters (0.96 quarts).

4 If the pressure drops by more than 0.1-0.2 bar (1.5-2.9 psi) and the delivery flow is correct, fit a new fuel pressure regulator.

5 If the fuel pump delivery flow is not correct, carry out test procedure B1D.