What are the symptoms of a faulty fuel pump?

[StLila]

Symptoms of a faulty fuel pump: 1. Weak acceleration with a jerking sensation during sudden acceleration; 2. Difficulty starting the engine, requiring prolonged key turning; 3. Unusual humming noise while driving; 4. Illuminated engine warning light; 5. Engine vibration. A fuel pump is a lightweight and compact pump, categorized into three main types: in-line, distributor, and unit pumps. The fuel pump requires a power source to operate, with its lower camshaft driven by the engine's crankshaft gear. Causes of fuel pump damage: 1. When fuel quality is poor, the fuel tank may contain various impurities or foreign particles. Although the fuel pump has a filter screen to strain the gasoline, it only blocks larger particles, allowing smaller impurities to be sucked into the pump motor, leading to long-term damage; 2. Failure to replace the fuel filter for an extended period, causing severe blockage in the fuel supply system, which forces the fuel pump to work harder and eventually fail due to prolonged high-load operation.