Fuel Pressure: Testing and Inspection

For fuel system related Testing and Inspection refer to Computers and Control Systems / Testing and Inspection. Testing and Inspection

The manufacturer does not provide a seperate fuel pressure test procedure. The vehicle is equiped with two pumps inside the tank; nominal operating pressure is 3 bar above manifold depression. Built into the pump assembly is an overpressure relief valve which blows at 4.5 - 8.5 bar. The second pump is controlled by the engine control module (ECM) the "switch on" logic is a map based on engine speed and load.