There is abnormal noise in Pu Sang. Please tell us what the reason is.

1, the engine has abnormal noise symptoms: there is more possibility of abnormal noise in the engine compartment, and most people also judge that it is abnormal noise in the engine compartment according to the sound source, usually metallic harsh noise or wind howling. Solution: The abnormal sound of the engine indicates that the technical state of a certain mechanism of the engine has changed. The main reason is that some parts are worn or even improperly adjusted. Some abnormal sounds can indicate that the engine may be accidentally damaged, so when the engine has abnormal sounds, it should be repaired in time to prevent the fault from expanding. Need to be reminded that if the engine is abnormal, most owners can't solve it by themselves, so it's best to send it to the factory for maintenance. 2. The gearbox has abnormal sound symptoms: If the car is driving, there is a "rustling" sound inside the gearbox, but it will be gone after stepping on the clutch or throttle, and there will be a whistle when shifting gears. Solution: There are many transmission parts, and the causes of noise are complicated. When analyzing and judging, we should pay attention to whether it is related to a specific speed. For example, the noise of some planetary gears is obvious around 50 km/h, and whether it is related to some gears is very important for judging the fault of the transmission. If a gear rings, it must be related to the parts that affect the transmission of that gear. If all gears ring, it is often the fault of the normally meshed gear shaft or the lack of oil in the transmission. Whether it is related to specific actions, such as upshifting, downshifting, starting, sudden acceleration, sudden deceleration, turning, etc. It is an effective means to judge abnormal sound, and changing the speed and direction is particularly important to judge the rear axle fault. If the abnormal sound of the transmission is obvious, it is recommended to send it to a professional repair shop to check the faulty parts and then replace them. 3. Symptoms of abnormal noise caused by wear: When you step on the accelerator or brake while driving, there will always be some abnormal noise in a certain part of the car body, which will not affect normal driving, but it will always make people a little worried about what is wrong. Solution: The abnormal sound of the door is mainly caused by insufficient lubrication, but it is necessary to judge whether it is the hinge position of the door or the glass lifter, door lock mechanism and handle mechanism inside the door. If it is a door hinge or stopper, the special grease for door hinge and slideway can be used, while the special grease for door accessories can be used for lubricating the glass lifter, door lock mechanism and handle mechanism in the door.