Automobile fault maintenance methods, all know that the car is more or less certain is a bit wrong, the important thing is when the car is malfunction, can accurately judge the damaged parts and eliminate the fault as soon as possible. Below Xiaobian teach you a few strokes to listen to distinguish the way of car fault, hope to help you owners. Impact sound: a heavy metal iron impact sound, it is likely that the engine fixture for long time serious wear and tear, when the engine speed changes will happen. But it is also possible that the front and rear suspension of the vehicle is damaged, or the transmission fluid is too low. Tapping: the sound is similar to the heavy knocking, but the noise is small. When the sound appears, the car mainly thinks about whether or not it uses inferior gasoline. If the low quality oil is used, it may also explode. Tick: maybe the universal joint of the drive shaft is damaged, or it may be caused by the small stone in the tyre beating or loosening of the tire or fan blade. Hissing: like a balloon leak, mostly air conditioning or cooling system is defective. If the cooling system fails, the liquid can be seen at the bottom of the car. In addition, a large tire leak or a leak in the engine vacuum chamber will produce this kind of noise. Rash: like a dull knocking. Most of these are internal causes of the engine, probably due to the aging of the vehicle, and the damage of the bearing or engine valve can also be caused. Howling: most of them occur when the car turns. It may be that the fan belt is loosened or worn. Sometimes there is not enough air in the tire, and this noise also occurs. Buzz: this sound is like a bee's sound, which is likely to be a loose part of a part of the engine, the plastic or metal parts at the bottom of the engine, and the loosening of the fixed bracket of the air conditioner or compressor. Roar: from the car with a "whoa..." The cry. It is very likely that the ball bearings in the wheels, compressors or pumps are broken, or it may be a malfunction of the air conditioner or compressor. Tone sandhi: the incongruous sound emitted by the main motor. Screams: harsh, usually brake problems.