What should be checked for abnormal noise in Volkswagen high-pressure fuel pump?

[LeChloe]

For abnormal noise in the Volkswagen 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 installed properly, and whether the engine belt shows signs of aging, looseness, or slipping. Determine based on the location of the abnormal noise: 1. On the right side of the engine, it is usually the generator belt. 2. On the left side, it may be an issue with the throttle valve. 3. Near the right front wheel, it could be due to damage caused when pressing back the brake caliper piston during installation, leading to a certain degree of jamming. Below is an introduction to the high-pressure fuel pump: 1. Only Volkswagen engines using turbocharged direct injection technology have a high-pressure fuel pump, which is an essential component of direct injection engines. 2. Many car engines use direct injection technology, where the fuel injector is inside the engine cylinder, allowing for higher injection pressure.