When the car is in normal idle and driving, the exhaust gas discharged from the exhaust pipe is basically a colorless gas, which will not let us know clearly. But we will also find that the individual vehicle exhaust pipe will be , and the smoke is different colors. Some cars are white smoke, some are blue, and some cars will even take black smoke. Exhaust pipe sweys, the outsiders may look for a lively, but the owner will look very anxious, I don’t know if my car is a big problem.
, whether it is a sealing problem of the piston ring, or the oil oil extraction, etc. It may cause a burning oil and exhaust pipe to catch a blue smoke.
If the car exhaust gas is black, and the engine jitter is large, there are many reasons for the engine, affecting the results. 
However, the white smoke is easily ignored by the owners. Because in rainy days or in winter, it is the most common. Generally, because the external ambient temperature is low, the gas discharged from the exhaust pipe encounters low temperatures to condense into a water mist.
Of course not!
However, if it is such a problem, there will be a white smoke after the exhaust pipe hot car, and the white smoke has a long time.
However, there is a white smoke shortly when the vehicle is started, and as the hot car disappears, it belongs to normal phenomena, not a failure.
So, if the exhaust pipe is white smoke due to, or the engine cylinder body injury, it is necessary to check the engine cylinder and the cylinder pad. If there is a serious problem, the relevant part needs to be replaced in time to avoid further damage to the engine. 
In addition, exhaust pipes can also be a white smoke may be due to the addition of private gas stations. If water is doped in inferior gasoline, then this part is injected into the combustion chamber. The water cannot be combusted, and can only be discharged from the exhaust pipe to form white fog. If you have added gasoline containing water or other impurities, it is prone to dynamic decline and accelerate weakness. 
In summary, the drum of the car sometimes like talking, the different smoke will also reflect different fault problems. If you encounter the corresponding problem, it is recommended that the owner Treated as soon as possible, because the small fault does not process, the time will become a big fault.