What are the causes of fuel pump failure?
2 Answers
Common symptoms of a faulty fuel pump include weak acceleration, jerking when accelerating suddenly, difficulty starting the engine (requiring prolonged key turning), and a humming noise while driving. The following are manifestations of fuel pump damage: 1. Pump core damage: When the fuel supply system is operating, there is no sound of the fuel pump running when the ignition is turned on. 2. Pump body damage: Due to pressure leakage, the fuel pressure cannot reach the specified value, leading to poor atomization and preventing the engine from starting. 3. Reduced lifespan: Do not wait until the fuel warning light comes on before refueling, as the fuel pump relies on gasoline for cooling. When the fuel level is too low, it cannot effectively dissipate heat, thereby reducing its service life.
As an experienced driver, I've seen many fuel pump failures. The main causes include clogged filter screens, where frequent use of low-quality fuel leads to impurity buildup that blocks the mesh and stops fuel flow. Electrical issues like aging wires causing short circuits or corroded connectors breaking signals are also common, especially in older vehicles with significant wiring wear. Pump motor wear is another major factor, with long-distance driving causing overheating that burns out the coils. Voltage instability, such as a faulty generator regulator producing too high or too low voltage, can also damage the pump. Additionally, driving with an empty tank causes the pump to overheat due to lack of cooling fuel. I use high-quality fuel and keep the tank at least half full, regularly cleaning the filter screen to prevent failures, ensuring both cost savings and safe driving.