What's with the black smoke from the car exhaust pipe?

Black smoke from the exhaust pipe of the car indicates that the gasoline is not completely burned. There are many reasons for this phenomenon. Internal problems of air intake system, fuel system and ignition system are all likely to emit black smoke. How to solve the problem of black smoke from cars?

Solution to black smoke from cars

1, the engine cylinder pressure is insufficient, resulting in incomplete combustion of combustible mixture during combustion, and then black gas will be discharged from the exhaust pipe. Check the sealing condition of the engine for air leakage.

2. There are faults in the automobile ignition system, such as spark plug, weak high voltage and ignition timing deviation. It will affect the poor combustion of the engine and produce black smoke. It is necessary to check whether the components of the ignition system are faulty.

3. Throttle carbon or dirt, intake pipe blockage will also affect the combustion quality of the engine. It is necessary to clean the throttle and intake pipe and replace the air filter to ensure sufficient intake air.

4. The main sensors of the engine also need to be checked. If the sensor fails, it will provide ECU with wrong information, which will affect the fuel injection time, ignition timing, air intake and other reasons. It is necessary to check the working voltage and resistance of the sensor, and then read whether the waveform of the sensor is normal.

5. There is something wrong with the quality of gasoline used. For example, if the oil is mixed with crude oil such as benzene, it will cause the engine to burn insufficiently and emit black smoke, so it is necessary to replace the car with fuel from a regular gas station.