What are the reasons for a car fuel pump having no power?
2 Answers
Possible causes include faults in the fuel injector's input and output circuits, such as loose wiring or poor connectors; it may also burn out due to voltage fluctuations from other parts of the car, resulting in no power. Function of the fuel pump: The role of the car fuel pump is to draw gasoline from the fuel tank and press it through the pipeline and fuel filter into the float chamber of the carburetor, providing the car engine with the power to start, thereby enabling the vehicle to operate. It is precisely because of the fuel pump that the gasoline tank can be placed at the rear of the car, away from the engine, and below the engine. Purpose of the fuel pump: The purpose of the gasoline pump is to supply the fuel required by various fuel injectors and cold start injectors. In electronically controlled fuel injection systems, there are generally two types of electric fuel pumps used: roller-type electric fuel pumps and vane-type electric fuel pumps. In a roller-type electric fuel pump, one end of the pump housing is the inlet, and the other end is the outlet. The roller pump on the inlet side is driven at high speed by the drive motor located in the middle of the pump housing. The rotor is eccentrically installed in the pump body, and the rollers are placed in the grooves of the rotor.
Last time my old car's fuel pump lost power due to a blown fuse. After long-distance driving, the fuse overheated and melted, cutting power to the fuel pump and causing the engine to stall. Wiring aging is also common, with rusty or loose wire connections, or dirty relay contacts failing to deliver electricity. I remember one instance where the relay coil was faulty, and replacing it fixed the issue. When the fuel pump loses power, the car won't start, which is particularly troublesome and can cost a lot for towing. During regular maintenance, I always ask the technician to check the fuse box and wiring connections. Preventive maintenance is crucial, including periodic cleaning of connections to avoid corrosion. Problems on the highway pose significant risks, so addressing issues early provides peace of mind.