Why is there no sound from the fuel pump of an EFI motorcycle?

1 Answers
Miriam
07/29/25 11:01pm
EFI motorcycle fuel pump may have no sound due to loose ECU wiring connections, resulting in poor signal transmission. An EFI motorcycle is a new type of motorcycle that uses a microcomputer to control the fuel injector to supply fuel to the working cylinders based on engine load, while non-working cylinders receive no fuel. Compared to traditional carburetor motorcycles, EFI motorcycles are more fuel-efficient, saving over 20% more fuel than their carburetor counterparts. Below is an introduction to the structural components of an EFI motorcycle: ECU: The abbreviation for Electronic Control Unit, which is essentially an integrated circuit board responsible for converting electrical signals from various sensors into digital signals. It processes these signals using programs stored in the circuit board's rewritable memory and then sends control signals to manage fuel injector operation and high-voltage coil ignition. Fuel Injector: A precision component responsible for spraying and atomizing fuel, typically installed at the intake pipe end of the throttle body.
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