What causes black smoke from a car? What s going on with the black smoke coming out of the car

The reasons are as follows: 1. It may be caused by incomplete combustion caused by the cylinder pressure of the automobile is too low. Incomplete combustion of gasoline produces black smoke that is then discharged from the exhaust pipe.

2. There is a problem or failure in the ignition system of the car, such as spark plug leakage, high voltage too weak or weak jumpover, etc.

3. There is a problem with the quality of the gasoline used or it is too bad. For example, the oil is mixed with crude oil varieties such as benzene for industrial use.

4. The reason for incomplete combustion caused by the blockage of the air filter and the excessive concentration of the mixture or insufficient oxygen.

5. It may be the black smoke caused by the oil level of the carburetor float chamber being too high. There are many reasons why the oil level is too high, including the broken and sinking of the float, the oil inlet needle valve is not tight, and so on.

Solution: 1. Check the aging degree of carburetor and other parts frequently, carburetor car is different from EFI car, it is necessary to maintain and adjust frequently, develop good car habits, EFI car should check the cylinder line every 30,000 kilometers, check the spark plug every 10,000 kilometers, and replace it in time if there is a problem.

2. For older vehicles, the sealing of cylinder blocks, pistons and other components should be checked frequently, and when blue smoke is found, it should be repaired at the maintenance station in time to prevent greater losses.

3. Add an appropriate amount of engine oil, too much or too little should not be caries to check the use of engine oil regularly, once the oil consumption is found to be abnormal, immediately go to the professional maintenance station for inspection.

Fault phenomenon: When the car is driving, the engine exhaust pipe emits black smoke, and the exhaust pipe (muffler) has an abnormal sound.

Cause of failure: The mixture is too thick, that is, the mixture in the cylinder is excessive, the air coefficient is too small, the combustion is incomplete, and part of the fuel is decomposed into free carbon at high temperature and discharged from the exhaust pipe, and black smoke is formed. The ignition timing is inaccurate, which will also make the mixture incomplete; Or if a few cylinders of the engine do not work, there will also be a small amount of black smoke discharged.

Fault diagnosis and elimination: 1. If a large amount of black smoke is discharged from the engine exhaust pipe, accompanied by the sound of firing guns, it can be concluded that the mixture is too thick. Check whether the choke is fully opened in time, and carry out high-speed maintenance if necessary; After the flameout, look at the main nozzle from the carburetor mouth, if there is oil injection or oil dripping, the oil level of the float chamber is too high, it should be adjusted to the specified range, and the main measuring hole should be tightened or replaced; The air filter is clogged and should be cleaned or replaced.

2. If a small amount of black smoke is discharged from the engine exhaust pipe, accompanied by a rhythmic "burst" sound, it can be concluded that it is caused by a small number of cylinders not working or ignition timing inaccuracy. You can use the cylinder-by-cylinder disconnection method to find out the non-working cylinder, or check and correct the ignition timing.

The exhaust pipe is a part of the engine exhaust system, the exhaust system mainly includes the exhaust manifold, the exhaust pipe and the muffler, generally to control the emission of engine pollutants The three-school catalytic converter is also installed in the exhaust system, and the exhaust pipe generally includes the front exhaust pipe and the rear exhaust pipe.

Black smoke from a car is a relatively common symptom, indicating that the engine mixture is too thick and causes insufficient combustion, which is a sign of engine failure. However, there are relatively many reasons for it, when the air filter is too dirty, the spark plug is poor, the ignition coil is faulty, etc., it will cause black smoke from the engine exhaust, if your vehicle has this problem, then it is recommended to go to the repair shop for maintenance.

Three common causes of black smoke from car engines.

1. The reason for the quality of the fuel used, when you use inferior gasoline, it is easy to have a similar situation, if you accidentally add inferior gasoline, there are more impurities, and the combustion efficiency will inevitably be greatly reduced.

2. The air filter is blocked, resulting in excessive concentration of mixed gas, which causes insufficient oxygen supply to the engine and produces insufficient combustion.

3. When the ignition system of the car fails, it will also make the car emit black smoke, which is likely to be caused by spark plug leakage, too weak high voltage, weak flashover, etc.

Extension of knowledge. White smoke from a car – if it's just a little white smoke in winter, it's usually just condensation, which is normal. However, if there is a large amount of white smoke, it is caused by the engine cylinder and the water channel, the cooling water enters the inside of the engine, and the heating becomes water vapor discharge, at this time, the engine is high temperature and acceleration weakness, which is likely to cause major damage to the engine.

Blue smoke from the car - If it is blue smoke, many car owners may know that it is caused by the engine oil jumping into the inside of the engine, which is commonly known as "burning engine oil". At this time, the acceleration ability of the engine decreases, the noise becomes louder, and the cylinder wall will wear out over time, and in severe cases, the entire engine will be damaged.

The cause of black smoke in a car is that the fuel is not fully combusted.

In the case of high temperature and lack of oxygen, the fuel oil can not be completely combusted, so it decomposes and collects to form soot, which is a small diameter of the aggregate. Because this kind of aggregate is much slower than the gasified fuel, and because of the high temperature and anoxic environment of the combustion chamber, it cannot be fully burned again and is discharged through the exhaust pipe, so the appearance is black smoke.

Black smoke from the car solution:

1. Clean the corresponding accessories to avoid clogging, air filters and fuel injectors are the accessories that are often cleaned.

2. Frequently check a series of accessories, such as system oil pressure, air filter, oil supply system, air intake system, air intake system and air intake pressure sensor, circuit, spark chill and ignition line, oxygen sensor, flowmeter and related lines, injector related lines, pressure regulator and related lines.

3. Repair and replace the corresponding accessories, air filter, fuel injector, valve seal, cylinder barrel and piston matching, oxygen sensor, etc.

4. Do not use fuel oil at will, and choose the quality of oil of the same brand. The choice of fuel model is also very important, do not choose different models at will.

5. Driving habits are also very important, if you often press the accelerator, the problem of black smoke from the car will be aggravated and often occur.

Causes of black smoke from the engine: piston ring wear, change in the shape of the combustion chamber, poor injector operation, excessive oil supply, improper adjustment of the oil supply advance angle.

1. The piston ring is worn

After the piston ring is worn, it causes insufficient compression pressure and oil channeling on the combustion chamber, so that the normal proportion of the mixture gas mixture changes at the end of the cylinder compression stroke, so that the fuel is burned under oxygen-free conditions, and the combustion process is easy to produce carbon deposits, and the exhaust gas discharged forms a large number of black smoke.

2. The shape of the combustion chamber changes

The shape of the combustion chamber is degraded due to the manufacturing quality and long-term use, and the compression gap is too large or too small, and the piston position is wrong, which will change the shape and volume of the combustion chamber, thereby affecting the quality of fuel and air mixture, and making the fuel combustion conditions worse.

3. The injector is not working well

In the process of diesel engine fuel injection, at the end of each injection, the injection pressure drops, and the atomization quality is poor, so that the droplet diameter is 4-5 times larger than the oil droplets in the main injection stage, and the evaporation and combustion time of these oil droplets is short, and the concentration of surrounding oxygen is low, which is easy to produce soot.

4. The oil supply is too large

The amount of oil entering the cylinder increases, resulting in more oil and less gas, and incomplete fuel combustion. In addition, excessive workload, poor fuel quality, and low operating temperatures can also cause black smoke from the exhaust. The high-temperature pyrolysis reaction of the fuel in the diesel engine is unavoidable, especially in the diesel engine with spatial mixed combustion, because the high-temperature gas surrounds the liquid oil droplets, creating conditions conducive to the pyrolysis reaction, so a large number of carbon particles are generated in the early stage of combustion.

5. Improper adjustment of the oil supply angle in advance

The advance angle of fuel supply is too large, the fuel is injected into the combustion chamber too early, because the pressure and temperature in the cylinder are low at this time, the fuel can not be ignited and burned, when the piston goes up, the cylinder reaches a certain pressure and temperature, and the combustible mixture is combusted. In the direct injection diesel engine, when other parameters remain unchanged, increasing the fuel injection advance angle can reduce the exhaust smoke, increase the combustion noise, and cause a large mechanical load, as well as more black smoke emissions.

The car emitted black smoke because it was not burned completely.

The following are three common reasons for black smoke from cars: 1. The reason for the quality of the fuel used, when inferior gasoline is used, it is easy to have a similar situation. 2. The air filter is blocked, resulting in too concentrated mixed gas, which causes insufficient oxygen supply to the engine and produces insufficient combustion, which is also more common, and the owner can replace the air filter by himself.

3. When the ignition system of the car fails, the car will also emit black smoke, which is likely to be caused by spark plug leakage, too weak high-voltage stupid trembling, weak flashing and other reasons. The following is the solution to the black smoke emitted by the car: 1. First check whether the air intake does not meet the requirements, check this need to see if the air filter is working normally, whether it is blocked, if not, then see if the air flow meter is working normally, whether there is an error.

2. The second is to see if the fuel injection volume of the fuel injector is not defeated, whether the atomization degree of the fuel injection is up to the standard, whether the problem is that the quality of the fuel injector is not up to standard, and it needs to be replaced with a better fuel injector, or it needs to be cleaned. 3. See if there is a problem with the work of the engine, if there is a problem with the engine, it is generally about the spark plug and the ignition coil, whether the spark plug has not been replaced for too long and needs to be replaced, if there is the aforementioned engine shakes violently and the power is insufficient, and the symptoms of not being able to lift the energy when accelerating, it can basically be concluded that it is a spark plug problem. 4. Check the cylinder pressure, if the cylinder leaks, the appearance of black smoke is obvious, of course, there is also a situation where too much carbon has accumulated in the valve and combustion chamber, and the carbon is discharged from the exhaust pipe with the tail pin.

5. Finally, it is to observe the situation of ignition and fire, whether the timing is not accurate enough, if the timing is not accurate enough, the exhaust pipe will also emit black smoke, but this step is better to go to the relevant maintenance station for inspection.

The vehicle emits black smoke because the mixture is too thick, that is, the mixture in the cylinder is too small, the number of air systems is too small, the combustion is incomplete, and part of the fuel is decomposed into free carbon at high temperatures and discharged from the exhaust pipe, thus forming black smoke.

The main problem is that there are problems with control. You should check the working condition of the flow sensor, throttle position sensor, and oxygen transmitter nucleus. The sensor in question needs to be replaced.

Just go to the 4S store and swap it out. Mechanically check that the fuel pressure is correct. In addition, there are severe symptoms of carbon pollution.

It is best to clean the air intake, combustion chamber, three-way catalytic converter and throttle. Finally, the exhaust gas analyzer is used to detect the combustion data to determine the construction effect, so that this problem can be alleviated.

Black smoke is caused by improper mixing ratio and incomplete combustion due to poor fuel system and air intake system. In this case, there will be a series of problems such as black smoke, knocking, lack of power, unstable operation of the boring engine, and shaking. It will directly affect the normal driving of the car, and even cause more serious failures.

The problem is caused by the lack of regular maintenance of the fuel system, air intake system, and fuel nozzles, resulting in impurities such as carbon deposits and sludge. As a result, the car must clean and maintain the fuel system for a certain period of time.

Millions of car purchase subsidies answered.

There are many reasons for the failure of black smoke from the exhaust pipe of a car,1Due to the uneven or excessive oil supply of each cylinder of the high-pressure oil pump. The uneven oil supply will produce unstable speed and intermittent black smoke.

2.The quality of diesel fuel is too poor, it is not easy to catch fire, so that the exhaust gas emits black smoke, and at the same time, the combustion chamber and exhaust pipe are also prone to carbon deposit. 3.

The mixture is too thick, and the combustion is not enough! There are many reasons for this failure, high fuel pressure, damaged fuel injector dripping oil, poor ignition performance, inaccurate signal of water temperature sensor, oxygen sensor, air flow or inlet pressure sensor! 4.

The wear of cylinder liners and piston components is serious. When this happens, the piston ring seal is not tight, and the air pressure in the cylinder drops seriously, resulting in the diesel fuel can not be fully burned and black smoke is emitted, and the engine power drops sharply.

The reasons for the black smoke emitted by the car are: 1. The oil supply of each cylinder of the high-pressure oil pump is uneven or too large; 2. The quality of diesel is too poor, it is not easy to catch fire, so that the exhaust emits black smoke, and at the same time, the silencing of the combustion chamber and exhaust pipe is also easy to produce carbon deposits; 3. The oil supply is uneven, which will produce unstable speed and intermittent black smoke; 4. The mixture is too thick and burns inexhaustibly; 5. High fuel pressure; 6. The fuel injector is damaged and dripping oil; 7. Poor ignition performance; 8. The signal of the water temperature sensor, oxygen sensor, air flow or inlet pressure sensor is not accurate; 9. The wear of cylinder liner and piston components is serious. When this happens, the piston ring is not tightly sealed, and the air pressure in the cylinder drops seriously, resulting in black smoke from the diesel fuel that cannot be fully burned, and the engine power drops sharply, and the engine will automatically turn off in serious cases.