What causes the buzzing sound in the MG6 when starting the engine?

[McJasmine]

MG6's engine buzzing sound during startup is caused by clutch abnormalities. Engine intake pipe leakage: The intake system contains many intake manifolds or various valves. Leakage in these components can allow unwanted gases to enter, resulting in excessively high or low concentrations of the air-fuel mixture in the intake manifold. This ultimately leads to intermittent engine shaking or symptoms of weakness during idling. Fuel system blockage or malfunction: Due to clogged fuel tank vent holes, fuel tank switch, fuel filter, or partial blockage of the fuel line between the fuel tank and carburetor, the engine cannot receive the corresponding amount of fuel during idling. This causes the air-fuel mixture to become lean, resulting in weakened engine power output and idling vibrations.