What are the symptoms of a faulty fuel pump in a sedan?
2 Answers
The symptoms of a faulty fuel pump in a sedan are: 1. Weak acceleration with jerking during sudden acceleration; 2. Difficulty starting, requiring prolonged cranking; 3. Illuminated engine warning light; 4. Unusual noises during driving; 5. Abnormal engine vibration; 6. Fuel supply system failure. The causes of fuel pump damage include: 1. Use of low-quality gasoline leading to excessive impurities and clogging of the fuel pump suction filter; 2. Failure to replace the fuel filter that traps foreign particles and impurities regularly; 3. Delayed refueling, accelerating fuel pump wear. The function of the fuel pump is to pressurize oil from the oil pan and deliver it to the oil filter and various lubrication channels to lubricate the engine's main moving components and ensure oil filtration.
After driving for so many years, I've encountered issues with the fuel pump multiple times. The most obvious symptom is that the car is particularly hard to start—when turning the key, the engine seems to whine but just won't ignite. It gets even worse when driving; pressing the accelerator doesn't deliver the expected power, and the engine shakes as if it's falling apart. Once, the car suddenly stalled on the highway, the steering wheel became heavy, and the brakes felt soft, which scared me into immediately turning on the hazard lights and coasting to the roadside. Upon inspection, other symptoms include the car gasping for breath during acceleration and the whining noise getting progressively louder. For safety, it's crucial to stop and tow the car for repairs as soon as these signs appear. Regular maintenance should include keeping the fuel tank from running empty, as high fuel pressure can easily damage the pump.
