What causes black smoke from behind the exhaust pipe?

This should be caused by the engine control unit, caused by the mixture being too thick or by the oxygen sensor problem, I hope mine is helpful to you.

Hello, the black smoke from the air pipe is that the injector injects too much fuel, resulting in too much concentrated gas mixture and incomplete combustion, so a part of the carbon black is discharged from the exhaust pipe. It is advisable to check the fuel injection system as soon as possible. [If you have a problem with the car, ask the car master.]

4S shop professional technician, 10 minutes to solve. 】

It should be the problem caused by the three-way catalytic converter or incomplete combustion, I hope it can help you.

Hello! Black smoke from the exhaust pipe is usually a problem with the oxygen sensor, air flow meter, intake pressure sensor, it is recommended that you go to the repair shop to check! Especially the oxygen sensor!

I hope it will help you [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Under normal circumstances, it is overloaded, if it is a diesel car, this situation is normal, if it is a gasoline car is not normal, you have to go to the 4S shop for maintenance.

Most of the fire is inaccurate, and you need to adjust the fire head. Hope.

Hello this may be caused by the relatively high concentration of oil, glad your question.

Poor combustion [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, the mixture is too strong! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

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.

What is black smoke coming out of a car exhaust pipe? This happens a lot for some classic cars, but in reality, sometimes there are some newer cars as well, so what's going on?

What is black smoke coming out of a car exhaust pipe?

In fact, the black smoke from the exhaust pipe is related to the amount of fuel injected by the car, which generally occurs in carburetor cars, because the amount of fuel injected by carburetor cars is not controlled by a computer like other models but by the pedal throttle, which is not accurate enough compared with computer control. If too much fuel enters the cylinder, the cylinder can only be discharged with the exhaust gas when it is too late to burn, forming the black smoke we see.

What causes incomplete combustion of gasoline? There are the following situations, such as when the car starts in cold weather, the spark plug does not work smoothly, and it takes half a day for the motor to start, so that the gasoline can not be completely burned in the cylinder, and then it is discharged with the exhaust gas, that is, black smoke is emitted.

In addition, if the ignition time of the vehicle is incorrect or the ignition time is inaccurate, black smoke will be generated. There is less black smoke in electric locomotives. If there is black smoke, it is most likely that the cylinder is faulty. At this time, you can only send it to a special repair shop to have a look.

How to solve the problem of black smoke coming out of the exhaust pipe of a car?

1.First check if the intake air does not meet the requirements. To check this, we need to see if the empty filter is working properly and blocked. If not, we need to see if the air flow meter is working properly and if there is an error.

2.Secondly, it is necessary to see whether the fuel injection volume of the injector is normal, whether the degree of fuel injection atomization is up to standard, and whether the problem is that the quality of the injector is poor, and it needs to be replaced with a better one, or it needs to be cleaned; If not, is there a problem with the quality of the gasoline that has been refueled recently, and try another fuel. 3.

See if there is any problem with the engine. If there is a problem with the engine, it is usually about the spark plug and ignition coil. Whether the spark plug has not been replaced for a long time and needs to be replaced.

If the engine shakes violently, the power is insufficient, and the symptoms cannot be lifted when accelerating, it can be concluded that there is a problem with the spark plug.

4.Check the cylinder pressure. If the cylinder is leaking, the appearance of black smoke is understandable. Of course, there is also the case where too much carbon accumulates in the valves and combustion chambers, and the carbon is exhausted from the exhaust pipe along with the exhaust gases.

5.Finally, observe the ignition and fire distribution to see if the timing is not accurate enough. If the timing is not accurate enough, black smoke will come out of the exhaust pipe, but Bian Xiao thinks that it is better to go to the relevant maintenance station to check this step.

After the above steps, it is believed that the fault of the car has been alleviated, and the car can be smoothly on the road without emitting black smoke. If not, the car will have to be sent to a repair shop.

Answer; Normally, this is determined by the characteristics of the Cadillac ATS turbine engine, and the high proportion of oil and gas mixture in the cold car state leads to the production of black smoke due to insufficient combustion. The time is very short, no more than 15 seconds. Reason:

operating characteristics of a supercharged engine; The cylinder volume is constant, and the ratio of oil and gas mixture has a fixed standard, when ensuring that the engine works normally when the turbine starts, and the supercharged engine is single.

Black smoke from the exhaust pipe is a symptom of engine failure. Black smoke from the exhaust pipe indicates that the engine mixture is too thick, resulting in insufficient combustion. When the air filter is too dirty, the spark plug is broken, or the ignition coil is faulty, etc., it can cause problems such as black smoke from the engine exhaust.

The reasons for black smoke from the exhaust pipe are:1The combustible mixture is too thick.

2.There is too much oil in the engine fuel. 3.

Poor piston ring or crankshaft oil seal sealing. 4.There is moisture in the fuel.

5.Inferior spark plug 6The air filter is too dirty.

Workaround:1Check and diagnose high concentrations of flammable mixtures, especially carburetors and air cleaners.

2.There is no comparison between the blend and the oil mixture, or the oil brand used is not the same. If the oil mixture contains too much oil or the oil quality is poor, the oil of the combustible mixture cannot be completely burned, producing black smoke.

The above phenomenon can also occur in two-stroke engines with separate lubrication mode, unbalanced oil pumps, and excessive oil supply. At this time, the oil pump should be checked and adjusted according to the regulations to ensure the proportion of lubricating oil supply under different throttle openings. 3.

Excessive wear or breakage of a four-stroke engine, as well as excess oil in the crankcase, will cause the oil to enter the combustion chamber and cause excess oil in the mixture. If the crankshaft of a two-stroke engine is properly sealed, the oil from the transmission will also enter the crankcase and enter the combustion chamber along with the mixture. 4.

The fuel in the fuel tank contains water or the cylinder gasket of the water-cooled engine is poorly sealed, and the cold water enters the cylinder, and the fuel tank or cylinder gasket should be cleaned and replaced. 5.Replace inferior spark plugs or clean air filters.

Black smoke from a gasoline engine is rare. The black smoke is mainly caused by the incomplete combustion of the fuel in the combustion chamber. In the case of high temperature and lack of oxygen, diesel fuel cannot be completely combusted, so the ruler decomposes and aggregates to form soot, which is an aggregate with a small diameter.

Because the reaction rate of this aggregate is much slower than that of gasified fuel, due to the high temperature and anoxic environment in the combustion chamber, it cannot be fully burned again and then discharged through the exhaust pipe, so black smoke appears. As a direct consequence of this phenomenon, diesel engines have very high fuel consumption, very low power, and a large amount of carbon deposits in the piston and piston ring valves. In severe cases, the piston ring will be jammed, and the valve seal will not be tight, resulting in air leakage.

At the same time, it will accelerate the wear and tear of parts, thereby reducing the service life of the engine. So special attention should be paid to this aspect. This paper analyzes the main causes of black smoke from diesel engines and their solutions.

The reasons for the black smoke emitted by the exhaust pipe are as follows:

1. Black smoke from the exhaust pipe means that the exhaust gas contains too many carbon particles and the burning of reed socks oil is incomplete, and the main reason for incomplete combustion is that the fuel mixture is too thick;

2. The air filter is blocked and the air flow meter is damaged;

3. The atomization effect of the fuel injector is not good, pay attention to check the fuel quality;

4. There is air leakage in the cylinder pressure, excessive carbon deposition in the valve or combustion chamber.

The solution to exhaust black smoke from the exhaust pipe is:

1. For the old vehicles, the sealing of the cylinder block, piston and other components should be checked frequently, and when black smoke is found, it should be repaired at the maintenance station in time to prevent greater losses;

2. Add an appropriate amount of engine oil, check the use of engine oil regularly, and if you find that the oil consumption is abnormal, immediately go to a professional maintenance station for inspection.

Exhaust pipe maintenance method:

1. Prevent water from entering the exhaust pipe

Prevent water from entering the exhaust pipe during daily driving. When washing or driving a car in a rainy day, if water accidentally enters the exhaust pipe, it should be heated when the car is idling, and the water inside should be discharged through the exhaust pipe for about ten minutes.

2. Apply anti-rust oil for daily maintenance

When maintaining automobile exhaust, it is recommended to apply anti-rust oil on the exhaust gas for anti-rust treatment, and add anti-rust oil from the place where the exhaust gas is connected to the engine.

3. Keep the outside of the exhaust pipe clean and clean

If you find that there are oil stains on the exhaust surface, you should clean it in time to avoid discoloration of the exhaust pipe. The oil stain on the surface of the exhaust pipe will make the exhaust pipe yellow and discolored after heating the hot car, and the oil and mud attached to the surface of the exhaust pipe will affect the heat dissipation of the exhaust pipe, thus affecting the overall performance of the car.

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.

If you pay attention, you will often find that many exhaust pipes on the street "suddenly" emit black smoke, obviously burning gasoline, how can you still smoke black smoke? So, what to do if black smoke comes out of a car's exhaust pipe?

The cause of black smoke from a car's exhaust pipe.

1.The air filter is clogged, resulting in insufficient air intake and an over-dense mixer, but it is unlikely.

2.Insufficient cylinder pressure can lead to air leaks, such as misaligned piston rings and inaccurate air distribution.

3.Individual cylinders do not work (missing cylinders) or ignition is too late, which may be a spark plug failure or ignition advance angle control problem. 4.The exhaust system is clogged and the exhaust resistance increases, which may be due to excessive carbon deposits in the muffler.

5.The engine is overloaded, that is, the "small horse-drawn cart", such as the car is heavily loaded, the engine is in low gear and high speed, and large electrical equipment is used in the car.

6.The oxygen sensor installed in the exhaust pipe fails, which controls the concentration of the mixer by detecting the oxygen content in the exhaust gas, thus feeding back the engine to fuel and air ratio.

7.The injection pressure of the injector is too low, and the atomization effect is not good.

8.The fuel is too bad.

9.The engine temperature is too low for the water temperature to rise. It could be a malfunctioning thermostat.

What to do if black smoke comes out of a car exhaust pipe?

1.Black smoke from car exhaust pipes mostly occurs on carburetor models, and their fuel injection is generally controlled by the pedal throttle.

2.Black smoke from the exhaust pipe is generally due to the fact that the spark plug is not good and the fuel in the cylinder is not fully combusted, resulting in black smoke. In this case, the maintenance and replacement of auto parts should be carried out frequently!

3.What may also cause black smoke from the exhaust pipe of the car is the wrong ignition time of the vehicle, so it is necessary to master the correct ignition time!

4.Poor driving habits, insufficient cylinder pressure, and low engine temperatures can also cause black smoke from the exhaust pipe. Car owners should have their vehicles inspected and repaired regularly!

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.