Why is there abnormal noise from the high-pressure fuel pump of the Volkswagen Golf?
2 Answers
The following are the reasons for abnormal noise from the high-pressure fuel pump of the Volkswagen Golf: Body noise: This problem is usually caused by insufficient body rigidity, which leads to deformation of the vehicle during driving, friction or shaking between the door and the door frame, or friction between steel plates due to welding failure in some areas. Applying adhesive tape on the doors and windows or padding rubber in the friction areas may reduce or eliminate the noise, but these are only temporary solutions. Some cars have significant wind noise, which is related to their design. If it is confirmed that no additional items have been added, the owner should not try to solve it themselves. In addition, poor fixation between body components of some cars may also cause abnormal noise, which can usually be resolved by tightening the screws. Transmission noise: If there is a "rustling" sound inside the transmission while driving, and the noise disappears when the clutch is pressed, it indicates that the noise comes from a transmission fault, possibly due to wear of transmission bearings or gears, or bearing spots.
My Volkswagen Golf also had a high-pressure fuel pump noise before, a sharp sound like metal rubbing. I've been driving for almost ten years and found that such issues are commonly caused by internal wear or bearing damage in the fuel pump. For the Golf, the fuel pump is positioned towards the front, and if regular maintenance is neglected, dirty oil can clog the pump components, leading to noise. I've also experienced cases where the fuel pump drive chain was loose or the cam was worn, making a sound like a mouse gnawing—really annoying. If this noise isn't fixed promptly, not only could the fuel pump fail, but the engine might also stall, which is extremely dangerous on the highway. It's advisable to regularly check oil levels and quality and not wait until the problem worsens. Cleaning the fuel filter screen yourself can help temporarily. A mechanic once told me that if there's noise, it's best to go to a professional shop for a pump replacement, costing a few hundred yuan—much better than delaying repairs. Avoid those shady repair shops that promise cheap fixes.
