What are the effects of fuel pump pressure relief on a vehicle?

[Valeria]

Under normal circumstances, the fuel pressure provided by the fuel pump is generally around 3-3.5 bars. 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 pipelines and fuel filter to the carburetor float chamber. It is precisely because of the fuel pump that the fuel tank can be placed far from the engine, at the rear of the vehicle, and below the engine. If the fuel pump's pressure is insufficient, the following symptoms may occur: 1. A buzzing noise from the fuel pump under the rear seat while driving. 2. Weak acceleration, especially with noticeable hesitation during sudden acceleration. 3. Difficulty starting the vehicle, or failure to start. 4. The engine warning light on the instrument panel remains illuminated.