What Causes the Engine to Become Louder?

[AdelynLynn]

Engine noise increasing is caused by insufficient engine oil, poor fuel combustion, or premature fuel injection timing. The specific reasons for loud engine noise are as follows: Insufficient Engine Oil: This leads to inadequate lubrication of various components, resulting in wear sounds. Adding engine oil can resolve the issue. Poor Fuel Combustion: Low injection pressure, fuel injector dripping, poor fuel atomization, or delayed fuel injection timing can all cause poor fuel combustion, leading to knocking. The fuel injector should be removed for inspection and adjustment, and the fuel injection timing should be adjusted. If necessary, replace the parts to meet specifications. Premature Fuel Injection Timing: If the fuel injector starts injecting fuel before the piston reaches the designated position, fuel combustion occurs prematurely, causing high-pressure gas in the cylinder to impact the piston and produce rhythmic knocking sounds. Reducing the throttle makes the knocking more obvious. Adjusting the fuel injection advance angle can resolve the issue.