What are the symptoms of a bad car fuel pump?
2 Answers
Symptoms of a bad car fuel pump: 1. Causes the fuel supply system to fail, making the vehicle unable to start; 2. Reduced fuel supply pressure, with no sound of the fuel pump operating; 3. Weak acceleration, accompanied by abnormal noises while driving; 4. Engine warning light turns on, with abnormal engine shaking; 5. Difficulty starting the engine, requiring prolonged turning of the key. Reasons for a bad car fuel pump: 1. Fuel level too low, preventing the fuel pump motor from getting sufficient cooling and lubrication, leading to overheating or failure; 2. Poor quality gasoline containing impurities or foreign objects; 3. Long-term failure to replace the fuel filter, resulting in clogging.
When the fuel pump fails, the car will exhibit some obvious signs. First, there will be difficulty starting, especially when the engine is cold—you may need to turn the key multiple times to get it to start. Then, while driving, the vehicle may suddenly stall or experience a sharp drop in power, feeling like it's been drained of strength and struggling to climb hills. I've also noticed that acceleration can become weak and unresponsive, with the car failing to react when the gas pedal is pressed, and the engine warning light on the dashboard may illuminate as a warning. More commonly, unusual humming or hissing noises may come from the car, especially noticeable at low speeds, as this indicates the pump is struggling to work. Overall, this all boils down to interrupted fuel supply, so it's important to inspect the fuel system promptly. Otherwise, breaking down on the road can be troublesome—I’d recommend carrying some spare tools just in case.
