Is the abnormal sound of the car engine normal?

Abnormal sound of automobile engine is not a normal phenomenon. The causes of abnormal noise of the engine are air leakage from the exhaust pipe, dirty throttle and engine cylinder shortage. Here's a detailed explanation: the exhaust pipe leaks: when the intake and exhaust pipes leak, as soon as the vehicle speeds up, the exhaust speed will increase, and then the vehicle will have a loud roar. Dirty throttle: When the car accelerates, the load of the engine begins to increase. At this time, it is necessary to increase the throttle opening and increase the amount of oil. If the throttle valve is not opened to the optimal position due to dirty blockage, it will cause poor engine mixing ratio and make noise when accelerating. Engine cylinder missing: Engine cylinder missing mainly refers to one or more cylinders of the engine & Quot working normally usually means that the vehicle is not powered enough, the exhaust pipe is shaking violently, and the engine sound can be clearly heard. Solution: When the engine makes abnormal noise, it should be repaired in time to prevent the fault from expanding. Need to be reminded that if the engine is abnormal, most drivers can't solve it by themselves and can send it to the factory for maintenance.