Does Fuel Pump Pressure Leakage Increase Fuel Consumption?
2 Answers
The manifestations of slight pressure leakage in a fuel pump include: lack of power during engine acceleration; difficulty starting the car, requiring multiple ignition attempts; uneven engine rotation or noticeable shaking; a buzzing sound while driving; jerking sensations during sudden acceleration; and inaccurate fuel level readings. Below is more detailed information about fuel pumps: The function of a fuel pump: It is responsible for drawing gasoline from the fuel tank and delivering it through pipelines and the fuel filter to the carburetor's float chamber. Thanks to the fuel pump, the fuel tank can be positioned at the rear of the vehicle, away from the engine and at a lower level. Fuel pumps can be categorized into two types based on their driving mechanisms: mechanically driven diaphragm type and electrically driven type. Identifying a fuel pump: There are two fuel pump wires: one for power supply and one for grounding. The fuel pump operates with high current, so its wires are thicker, while sensor wires are thinner, making them easy to distinguish.
Fuel pump pressure leakage does indeed increase fuel consumption. From my actual driving experience, I've noticed that the fuel pump is responsible for maintaining stable fuel pressure. If there's a pressure leak, the system needs to activate the fuel pump more frequently to maintain the required pressure. The consequence is that the fuel supply system has to compensate constantly, combustion efficiency decreases, power output becomes less smooth, and ultimately you end up pressing the accelerator more to compensate for the power loss. A friend of mine previously experienced an extra 2 liters per 100 km fuel consumption due to fuel pump pressure leakage, and inspection revealed a failed pressure relief valve spring. This phenomenon is often accompanied by difficulties with cold starts and jerky acceleration, so it's crucial to promptly check whether the fuel pump pressure meets standards.
