Why Does the BMW N20 Engine's High-Pressure Fuel Pump Make Noise When Starting?

1 Answers
DeTessa
07/29/25 7:59pm
BMW N20 engine's high-pressure fuel pump making noise when starting is mainly caused by overfilling the fuel tank, insufficient fuel storage, or fuel pump damage. Overfilling the Fuel Tank: When refueling the car, it is advisable not to fill the tank completely at once, as this may cause the fuel float and sensor to malfunction, distort the fuel gauge, and increase fuel consumption. It is recommended to refuel when the fuel level is low. Insufficient Fuel Storage: When refueling the car, do not wait until the fuel warning light comes on. Having too little fuel or running out of fuel may burn out the fuel pump and reduce its service life. Fuel Pump Damage: Improper refueling behavior may damage the high-pressure fuel pump.
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