Operation CHARM: Car repair manuals for everyone.

Fuel Pump: Testing and Inspection

Checking All Pressures


Connect pressure gauge 5011

Fig. 4 Fuel pressure gauge connections.:






Turn off the ignition.

Connect the gauge between the control pressure regulator and fuel distributor.

E/F: use pressure gauge 5011, hose 5116 and adapter 5032.
Turbo: use pressure gauge 5011 and adapters 5228 and 5229.






Turn on the ignition to start the fuel pump

Check the line pressure






Turn the gauge cock on 5011 to position 1 (towards the fuel distributor).

Record the pressure when stable. The line pressure must be:

E/F: 450-530 kPa (65-77 psi)
Turbo: 520-580 kPa (75-84 psi)

Check the control pressure (cold control pressure regulator)






Turn the gauge cock on 5011 to position 2 (at right angles to the hoses).

The control pressure regulator should be at the temperature of the surroundings.

Too low: test with a new control pressure regulator.