1 exhaust black smoke performance: the engine shake, exhaust abnormal sound issue, while black smoke exhaust the body, acceleration feel powerless. Cause: The cause of the malfunction resulting smoke more, if the car is black smoke that causes carburetor is more complicated. Such as cold start, the spark plugs work well, fight a long time to start the motor, so the plot of the mixture in the cylinder can not be completely burned natural smoke will be discharged; or vehicle ignition at the wrong time, in advance or after the fault will cause smoke generation. EFI cars are generally very little black smoke, if you really smoke a smoke, it is mostly cylinder body broke down. "Off tank" is a common one. Approach: basic carburetor cars are now on the age, should always check the carburetor and other parts of aging, carburetor cars is different from the EFI cars, to regular maintenance and adjustment, to develop good The car habit. EFI car to check the tank every 30,000 km cable, check the spark plugs every 10,000 km, there are problems to be promptly replaced. (2) performance exhaust white smoke: a car, showing a lot of white steam and smoke is not associated with the engine running smoothly, even if the engine warm-up work is still a lot of water vapor emitted. Reason: cause white smoke may be due to the engine cylinder cylinder pad wear, have a certain gap, resulting in a large number of water cooling system into the combustion chamber. Water can not burn, the heat generated after the steam directly from the exhaust. Methods: Check engine block, cylinder head gasket for damage, check whether there is water inside the tank. Also, check vehicle specification, in strict accordance with the provisions of the manufacturers to add the correct grade of gasoline. In addition, there will be a small amount of low-temperature hot car exhaust white smoke, which is the normal exchange of hot and cold, hot car white smoke disappear. 3. Take the blue smoke exhaust performance: vehicle explosive down, feeling weak acceleration, noise becomes large, blue exhaust smoke emissions and oil combustion along with the coke burnt taste. The same time by checking the oil gauge oil consumption will also find a large, under normal circumstances, each maintenance finished, after driving 5,000 km, oil consumption should be within the normal range, no way to add. Reason: more blue smoke is due to internal engine failure, causing oil jump into the combustion chamber resulting from, there are two common situations: First, serious wear and tear. Cylinder wall scratches, bad seal or piston valve was severely worn, will have a gap, and the original charge of lubricating oil at this time will jump into the combustion chamber through the gap in the combustion, burning oil can not be discharged when the vehicle had a blue color of the smoke. The second is also easily lead to excessive oil filler burning oil. Some owners mistakenly believe that the oil plus the better, but does not know too much oil will be brought into the cylinder for combustion, resulting in the phenomenon of burning oil. Excessive filling of the oil will block the normal operation of the crank arm, let the additional work done to increase energy consumption.