Find car exhaust black smoke reasons

Car exhaust black smoke is generally caused by incomplete combustion, many reasons: injector clogging damaged spark plugs, intake air pressure sensor or air flow meter had stolen, or damaged, the oxygen sensor is damaged, the temperature sensor is damaged, the air filter clogging and so on.
Black smoke
The carbody performance: car engine shake, exhaust pipe is not normal sound, while the discharge of black smoke body acceleration feel powerless.

The cause of the malfunction: smoky phenomenon is more common in the carburetor car, this is due to the the carburetor models fuel injection quantity is not controlled by the computer, but by the foot throttle control, in some cases too much fuel the burning discharge car into the cylinders too late, thus causing the smoke we see.
The more produce black smoke Failure carburetor car black smoke reason is more complicated. Such as cold start, the spark plug is not good, want to make a half-day to start the motor, such a product mixture of the cylinder is not completely burned, will naturally have a smoke discharge; or vehicle ignition at the wrong time, in advance or after the mistake will resulting in smoky generated. EFI car black smoke very little, if it emitted smoke, it is mostly the fault is the cylinder body. Off tank "is a common one.
Approach: 1. Carburetor car now basically have been on the old, and should always check the carburetor and other parts of the aging, the carburetor cars is different from the EFI cars, to regular maintenance and calibration, develop good car habit. EFI car to check the tank every 30,000 km, check the spark plugs every 10,000 km, the problem must be promptly replaced.