What is the reason for the noise when the car is accelerating?

1. The air inlet pipe is perforated and leaked. At present, the intake pipes of many vehicles are made of engineering plastics. The aging of the intake pipe is likely to cause air leakage, resulting in abnormal sound during acceleration.

2. The valve clearance is too large or too loose. In fact, the valve will also wear. When worn to a certain extent, the valve clearance will be too large, and the air will hiss when passing through the valve.

3. The engine oil is not clean. Oil has the function of lubrication, but when the vehicle has not changed the oil for a long time, there will be a lot of dirt in the oil. At this time, if effective lubrication is not carried out, the engine will produce abnormal noise.

Problems needing attention in automobile speed increase

When a vehicle with manual gear is downshifted to first gear and then stepped on the accelerator, it will be found that the vehicle accelerates a lot. This situation is also reflected in the automatic transmission, but some drivers may ignore it. When driving in automatic gear, if you step on the accelerator, the speed will be greatly improved and the gear of the car will automatically drop by one gear.

Therefore, when the owner's friend finds that stepping on the accelerator can't achieve the desired effect, he can try to downshift first and then step on the accelerator. But this is just a skill. The real speed has a lot to do with the performance of the car.