What's with the engine throttle?

Excessive carbon deposition in the throttle and air intake or blockage of the air filter element will cause insufficient combustion of the engine and make the engine throttle sound louder. This may be caused by worn parts or improper assembly and adjustment. Some abnormal sounds can still predict the possibility of accidental damage to the engine, so when the engine is abnormal, it should be repaired in time to prevent the fault from expanding.