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What Causes the Abnormal Noise in Volkswagen's High-Pressure Fuel Pump?

1 Answers

BennettFitz

07/30/25 2:48am

For abnormal noise in Volkswagen's high-pressure fuel pump, it is necessary to check whether there is air leakage in the engine's intake pipe, whether the air filter is properly installed, and whether the engine belt shows signs of aging, looseness, or slipping. The source of the noise can be determined based on its location: noise on the right side of the engine is usually from the generator belt; on the left side, it may be an issue with the throttle; noise near the right front wheel could be due to damage caused when pressing the brake caliper piston back during installation, leading to some degree of jamming. Only Volkswagen engines using turbocharged direct injection technology have a high-pressure fuel pump, which is an essential component of direct injection engines. Many car engines use direct injection technology, where the fuel injector is located inside the engine cylinder, allowing for higher injection pressure.

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