What Causes the Whistling Sound When Accelerating the Engine?

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The reasons for the whistling sound when accelerating the engine: 1. Loose pipe connecting the intake grille to the air filter; 2. Belt squealing outside the engine; 3. Mechanical failure inside the engine. For the first case, simply wrap the pipe connecting the intake grille to the air filter with tape. If it's the latter two cases, it is recommended to promptly visit a 4S shop for inspection and repair. An engine is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc. For example, an internal combustion engine typically converts chemical energy into mechanical energy. The term engine can refer to both the power-generating device and the entire machine including the power unit.