What is the reason for the buzzing of automobile motor?

The causes of automobile motor buzzing are air leakage from exhaust pipe, dirty throttle and engine cylinder shortage. The following is a detailed introduction and solution: 1, air leakage of exhaust pipe: solution: reduce the speed increase. When there is a leak in the intake and exhaust pipes, as long as the vehicle speeds up and the exhaust speed is accelerated, there will be a loud roar. 2. Dirty throttle: Solution: Turn the throttle to the best position. When the car accelerates, the load on the engine begins to increase. At this time, it is necessary to increase the throttle opening and increase the fuel quantity. 3, the engine is short of cylinders: Solution: the vehicle is not powered enough, and the exhaust pipe is severely shaken. When the power of the vehicle is insufficient and the exhaust pipe shakes seriously, you can clearly hear the "sudden" or plop, plop roar of the engine.