What Are the Reasons for Increased Car Noise?

[AmeliaMarie]

Reasons for increased car noise include insufficient engine oil, poor fuel combustion, and premature fuel supply timing. Insufficient engine oil: Various components cannot receive normal lubrication, and wear leads to increased engine noise. Adding engine oil can solve the problem. Poor fuel combustion: Low injection pressure, fuel injector dripping, poor fuel atomization, and delayed fuel supply timing can all cause poor fuel combustion, leading to knocking and increased engine noise. The fuel injector should be removed for inspection and adjustment, and the fuel supply timing should be adjusted. If necessary, replace the parts to meet the specifications. Premature fuel supply timing: When the piston movement has not reached the specified position, the fuel injector starts injecting fuel, causing premature fuel combustion. High-pressure gas in the cylinder impacts the piston, producing a rhythmic sound. This issue can be resolved by adjusting the fuel supply timing.