What is the normal pressure for a fuel pump pressure gauge?

[McBradley]

Under normal circumstances, the fuel pressure provided by the fuel pump is generally around 3-3.5 bar. The gasoline pressure may vary depending on the vehicle model. The function of the fuel pump is to draw gasoline from the fuel tank and deliver it through the pipeline and fuel filter to the carburetor float chamber. It is precisely because of the fuel pump that the fuel tank can be placed at the rear of the vehicle, far from the engine and below the engine. According to the different driving methods, fuel pumps can be divided into two types: mechanically driven diaphragm type and electrically driven type. During operation, in addition to providing the fuel consumption required for engine operation, the fuel pump flow should also ensure sufficient return flow to maintain stable fuel system pressure and adequate cooling.