Black smoke when gas. Black smoke from the exhaust pipe - causes, consequences and solutions. It goes black smoke from the exhaust pipe. How to remove blue smoke

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As I promised in the last article, I will scatter all kinds of smoke. Today there came a series of "black smoke", he can manifest itself both on and on diesels. Why this happens and what it means, in detail in this article ...


You know, to great relief, it does not speak about a serious engine breakdown or auxiliary systems. But if it is not possible to eliminate this problem in time, it is possible to bring the flow system to the deplorable state, the fuel ignition system, as well as the engine itself, because they are the causes of black smoke from the muffler.

Manifests: - in the form of a thick black exhaust from the muffler, it is especially strong when you click on the gas pedal. Moreover, the car is not stable, often the motor "Troit", poorly starts in the morning (especially in winter time). Increases fuel consumption.

Main reasons

Black smoke talks about too saturated (re-entered) fuel and air mixture. A lot of fuel comes into the cylinders, which does not have time to effectively burn, so exhaust is repainted in black. It is much toxic and more harmful than the normal exhaust, because it cannot even contribute to the combustion of the surplus of fuel in the exhaust.

The main reason for this fault of the fuel supply system is found in all types of engine internal combustion ().

The second reason may be a malfunction in the ignition system, the fuel is not ignited in the chamber and therefore the raw mixture goes directly into the muffler, and the engine will be.

In carburetor ignition

The carburetor is everything quite simple - if the exhaust is painted in gray-black tones, there is no stability of work in the first place to look. Most likely, there is a place here to overflow in the float chamber.

This happens for two reasons:

1) Neighfectory "needle" (needle valve), it can shindle or on the contrary to pass the excess fuel.

2) clogged, stuck (from our fuel) jets. Small "nozzles" with precise size.

You need to disassemble the carburetor to clean it, if it does not help, then you need to buy Repair Kit and replace the "needle" and jets and correctly set the level of gasoline in the chamber.

Injector option

It's all a bit more complicated on the one hand, and easier on the other. The injector has no cameras with a float of needles, etc., this is a completely different system that supplies the fuel and air mixture with electronics. Injection in cylinders occurs with special devices - "Injectors", from here and name.

The main reasons for black exhaust:

1) In often the cause is the injector itself, he simply clogs and cannot normally apply fuel. Pressure accumulation occurs, and then "strong" injection is often with surplus. The engine work will not be stable, then low revs, then high - simple words will "swim". In such a situation, you need to clean the injectors, there are many different ways, from the removal of fuel rail, to special means that are added to gasoline - to solve you, but after such manipulation, it is often possible to get rid of black smoke from exhaust pipe. Performance is restored. Cleaning you need to do at least once every 60 - 70,000 kilometers.

2) Since the system is automated, it monitors various cycles using sensors. So if the sensor is not in good condition, it either will not allow the car at all, or it will serve too much fuel. There you can hardly easily digitate the breakdown, you need to go to a hundred.

3) Fuel pump. Usually in the injectors, it is in the tank, there were cases when he applied increased pressure. What also led to overflow in injection chambers. Again you need to replace.

Diesel engine

Generally a diesel engine is a record holder for black exhaust. The thing is that he has a slightly different fuel ignition system (from pressure), and it works on a diesel engine (diesel), and even in normal condition gives a little black exhaust. Recall at least our "KAMAZ". However, in recent times, it is struggling with such exhaust, it is very toxic and poisonous, it contains a lot of lead. Therefore, now almost on all diesels install "", in favor of Euro 5 standards, it cleans the exhaust and does not allow penetration into the air harmful substances.

Causes of black smoke:

1) it is a trite failure squeeze filter, it just needs to be replaced. However, the intensity of smoke will not be so high.

2) broke the pump high pressure. It goes overflow. Just need to change.

3) Incorrect ignition advance angle. Need to adjust.

What can lead such smoke from the exhaust pipe

If you do not take action on time, you can run into decent malfunctions. For example, injector cars, the catalyst is quickly dying, but it is not very cheap to replace it (many even remove it).

Also, if it is a big overflow through the "Injector", it can lead almost to, because sometimes fuel is fed in liquid form, and not in the air mixture. It is very dangerous, difficult breakdown.

On a dysel from a large amount of fuel, it can break the block, because there is even more pressure than gasoline engines.

As you can see, the black smoke itself does not carry difficult faults, but if it does not react on it on time, it may pour out big problems.

What do you think, what? This is a question about the color of smoke from the exhaust pipe. On numerous forums on the Internet every day a huge number of people are looking for the reasons that may have led to the formation of severe smoke in exhaust system. Offer detailed instructionswhich will help you learn about the color of the exhaust cause for the formation of unnecessary smoke.

See also: The most expensive breakdowns in the car

Usually we do not think about how everything works in the car, and do not go into details about the device vehicle. But it happens exactly until that moment until our car starts to show, which we begin to scare. Many of us after that, instead of contacting the car service, conduct sleepless nights in search of answers on the Internet for emerging issues about the car.

The most common, this is the appearance of excessive smoke from the exhaust system.

Unfortunately, information in the network is contradictory and can knock down anyone. We offer for you detailed instructions infographic, which will help learn the color of the exhaust possible cause of the car malfunction.


For those who do not know. On all modern cars in which engine drive engines operating temperature (90 degrees), and all systems work properly, the smoke from the exhaust system should not be visible.

It is important to know: five types of liquids that need to be checked in the car

There are three types of smoke that can leave the pipe. This is white, gray (white with a bluish tint) and black.

Here are the main reasons for which smoke forms a certain color:

White smoke It is formed due to evaporation of water, which is mixed with exhaust gases formed when the fuel combustion cycle in the engine

SIZY smoke * (blue, blue) is formed from mixing fuel residues that fall into the exhaust system, mixing with gases from the combustion chamber

Black smoke It suggests that in the combustion chamber during the cycle of work oversupply of fuel.

* Attention! Unfortunately, many owners are confused sIZY smoke with other shades of colors. In order for you to know exactly what the SIZY (blue, blue, gray-blue, etc.) looks like, below as a sample, we give all possible shades of the SIZOM. (Flower palette Yandex)


Below you can see three flowcharts (infographics) that will help you find out separately for each color exhaust possible reasons Smoke formation. Our instruction will allow you to save considerable funds that you give for diagnostics in the technical center. After all, done simple diagnosis With the help of our module schemes, you can find out how much the problem with the appearance of smoke is serious. Of course, have, in mind that our three schemes are not exhaustive, and do not take into account all possible fault options. But, nevertheless, our instructions will help give an idea of \u200b\u200bthe scale of the problem of the appearance of smoke from the exhaust vehicle system. Also, our infographics will tell you exactly where to seek a malfunction, which led to an excessive visible smoke from the exhaust pipe.


Many motorists noticed that they had a black smoke from the exhaust pipe on them. But, not everyone understands which reasons for the occurrence of this effect, as well as the methods of elimination.

The main reasons for the appearance of black smoke

Black smoke when starting the engine - this is not good sign. Most likely, the vehicle has sufficiently large problems inside the power unit, or related systems. As practice shows, the formation of such an effect on motors is due to the most part with a malfunction fuel system.

Thus, the yield of one of the elements leads to the fact that the motor begins to pour and violates the formation of air fuel mixes.

So, why is it going black smoke from the exhaust pipe of the engine? This question requires a deeper consideration. For each motor Top - it will be a separate reason, but it is inextricably linked to the formation of an air-fuel mixture. We will proceed to consideration.

Carburetor Engine

For carburetor gasoline engine, everything is quite simple and understandable. Many owners of this type of vehicles faced the fact that the engine was simply poured, after which he began to "chouch" and troit, and from the exhaust system went black smoke.

So, consider, the main causes and methods of elimination:

  • Needle carburetor. This element has a property to shind, especially when not high-quality fuel is flooded. As a result, it begins overflow, and the fuel burns not to the fullest.
  • Ignition. Damage to the spark plugs or incorrect ignition advance angle also becomes the cause, since the fuel combines not completely, which causes the formation of black smoke.
  • Many vehicles say that another reason for the formation of black smoke is wear piston rings and valve generation. In this case, it is best to contact the service station to troubleshoot.

Injector Engine

With an injector, things are a little worse. The appearance of a black exhaust indicates that first of all, it is worth checking injectors and nozzles. It is in clogging or too large fuel for the fuel that the problem may be. To diagnose these elements, there are special check stands, on specialized car services.

So, many motorists are trying to make cleaning themselves, but it is not always successful.

If the engine is started and a black exhaust of the silencer goes, then the gasoline engine could expose one more fault - the fuel pump broke. In this case, the amount of fuel supplied can be impaired. So, the motor is simply poured into the combustion chambers, it is not an air-fuel mixture, and the fuel flows the jet.

Another very important reason for the formation of smoke in the exhaust may be the clogging of the air filter. Therefore, it is recommended to change this element regularly and according to technical maintenance cards.

Like the filter element of the air, the cause of the violation of the formation of an air-fuel mixture may be a clogged choke. Cleaning this item is carried out quite easily with your own hands using the carburetor cleaning agents.

For the injector, as well as for the carburetor, the malfunction in the ignition system leads to the accumulation of fuel that does not roast. Thus, when conducting diagnostic operations, it is recommended to check this node. Perhaps one of the candles or high-voltage wire It turned out that he led to the emergence of such an effect.

Diesel

In a diesel power unit, the presence of black smoke from the exhaust pipe is a normal phenomenon. So, the engine comes out of the building a diesel filter that requires replacement. Also, the reason may be a malfunction of the fuel pump of high fuel pressure, which does not control the flow of fuel and simply fills the cylinders of the power unit.

For a diesel engine, there is a second danger, if the cylinders are flooded, and the fuel does not ignite, it can cause almost to the hydraulic man. Also, the consequence can be considered that the degree of extinguishing the valve mechanism and piston groupThat indisputably leads to the overhaul of the power unit.

It is worth noting that when repeatedly from the engine goes black smoke, most likely the motor has a nagar on the walls and in the main nodes. To eliminate the resulting fault, it is worth disassembling the engine and clean it.

Output

The formation of a black exhaust from the silencer is a sign that the power unit fills and malfunction, often lies in the supply of fuel. To eliminate faults, it is recommended to apply to specialized service stations. If the car enthusiast decided to solve the problem independently, then it is worth studying the device and the principle of operation of fuel feed.

avtodvigateli.com.

Black exhaust

The reason to seriously think about the state of the engine and the fuel injection system

When the motors were only carburetor, the black exhaust of the silencer meant, in the overwhelming majority of cases, only one thing - worn valve oil seals. Through which leaked, and burned together with gasoline, in the combustion chamber and oil. However, then there are already serious specialists here, "on the eye" determined the difference between a similar malfunction (now it is called - a gray exhaust), and the situation in which the exhaust was really black.

Causes of black exhaust

When gasoline does not burn, but cocks

In fact, the exhaust is painted in the black color of a unburned particle, charred fuel, which was not enough for detonation, simply oxygen, and which turned from the effects of the temperature in coal flakes. They come to the exhaust from the muffler black. And usually this process accompanied by a failure in the engine, "Trojection" on idling, a drop of thrust (very tangible, by the way). Well, this malfunction should be eliminated by adjusting the flow of oxygen into the combustion chamber.

When air inflow is not enough

In fact, everything is very simple. The process of combustion of fuel in the engine begins with the fact that gasoline comes from the tank into the carburetor (or in the nozzle, if it is about diesel engine), either in the injector. Here it is sprayed, mixing with the incoming air, turning into a combustible mixture, which is detonated in the combustion chamber, alternately pushing pistons. And if the air inflow is not enough, then the black exhaust from the engine is the only possible variant. Simply, a re-entered mixture is formed, which does not have time to completely burn. After all, even with a strong fire, remember, first of all try to overlap the access of air, oxygen to the hearth ignition. And then there is nothing to burn ...

In this case, you need to adjust the fuel level, clean the carburetor, jetters, maybe even everything will cost only the replacement of the air filter, which closing does not let sufficient air to create a mixture with the correct ratio of sprayed fuel and oxygen.

Abrasive processes in the combustion chamber: what threatens the black exhaust

Black exhaust always points to increased flow Fuel when operating the engine, however, this is a consumption that does not affect the power increase. On the contrary, there is a drop in power, and significant. And now - the most important thing.

  • The fact that from the muffler brings black smoke is not the worst thing.
  • The fact that this black exhaust is accompanied by a power drop (in which the car in the fourth gear develops from the strength of 100 - 120 kilometers per hour), is also not the worst.
  • Even the fact that the consumption of gasoline increases two times - not the worst consequence.

The black exhaust of the muffler threatens serious problems with the engine due to the fact that coal particles are not only from the silencer.

They also fall into the combustion chamber and, not burned, remaining there, in the space in which "walk" pistons, stick to the walls of the piston sleeves, while performing the role of a peculiar abrasive, pushing the walls that, in theory, should be perfectly smooth and polished . That's what the notorious black exhaust is. It is capable of an order of magnitude, at times to reduce the resource of the engine, causing the cause full repair (with grinding or replacement of sleeves).

And even unlawful excess of fuel can get into the lubricant system, diluted oil, making it unsuitable for lubricant. Sometimes this process is so intense that the oil level in the crank is significantly increasing. What, of course, also does not contribute to the durable engine operation. As well as the fact that gasoline's pistons and cylinders fell on the walls and cylinders simply flushes lubricant. As a result of all this, small scratches may form on the walls, and maybe even serious loans that the normal operation of the engine is by no means contributing.

How to get rid of black exhaust

Carburetor faults ...

How to cope with him? How to eliminate a malfunction in the fuel supply system and set the process of creating a enriched combustible mixture, in which the air and sprayed fuels would be kept in the proportions needed for normal operation? Actually need to search true cause Fault. As already mentioned, it may be (if it comes to carburetor engine) scored air filterwhich does not miss the system of sufficient air. The black exhaust of the silencer can be the consequence of the slanting hole in the loaf, through which the air does not flow, or the reason can be wounded in excessive supply of gasoline (if the float chamber is incorrectly adjusted, and the fuel level in the carburetor rolls).

... Injector and diesel ...

If we are dealing with injector injectionThe black exhaust of the silencer may also testify about the fault of the fuel consumption sensors (these nodes themselves are intended to adjust the amount of incoming air in accordance with the specified norm). Or, that by the way, it can be very relevant and in the case when the black exhaust of the muffler is observed when the diesel engine is operating.

Although with Diesel, of course, there are certain nuances. With a cold start, the black exhaust will be observed anyway. Moreover, cold launch For diesel - a serious test. No wonder in modern cars equipped with a diesel engine, a preheating system is always provided. But even she does not save from the exhaust at the initial stages of the operation of the engine running in the cold state.

Completeness of repair: Sometimes you can cope on your own, and sometimes you have to contact the specialists

It is important to simply correctly navigate and understand whether the exhaust has been cleaned enough quickly, whether the engine does not trite at idle, whether there is no power drops and an increased flow. If there is at least one of the listed faults - get ready for trouble. Or not quite large (adjustment), or to a fairly serious. Up to replacing the rings of the piston group, or the whole group itself.

To eliminate such a malfunction as the black exhaust of the silencer, it is also necessary to interfere with the operation of the fuel pump or turbocharger (up to replacement), because the exhaust may also mean a failure in the fuel supply system. When gasoline arrives too abundantly, and the system of creating a combustible mixture with a similar amount simply does not cope. And it may also be needed adjusting the pressure in the injector nozzles. These are faults with which it yourself, perhaps, can not cope. We'll have to contact a specialist.

To save the engine operation resource ...

Anyway, it should be clearly known that the black exhaust is not dangerous in the fact that it spoils the ecology (soot crashes from the muffler, stinks with gasoline), but also violates the normal operation of the engine, leads to increased fuel consumption and lowers the coefficient useful action his works. It should always be remembered that the particles of the fuel of the fuel not only fly out of the silencer, but also fall into the piston group, becoming abrasive and at an accelerated dark pace polished (ideally - as a mirror) the working surface of the sleeves, pistons and sealing rings.

This can lead to a tangible drop in the resource of the engine, and instead of the laid, say, according to passport data, 500 thousand mileage kilometers ( modern cars Designed to approximately such a resource) to repair, the engine will work an order of magnitude less. This is how the black exhaust of the engine silencer is in the first place.

znanieAvto.ru.

Black smoke from the exhaust pipe. The main reasons and what does it affect? | AML

One of the most common signs of car malfunctions is characterized by certain damage and smoke problems. The diagnosis of this problem is so wide that color, quantity, frequency of appearance and other factors that can signal problems are taken into account. But not everyone knows what the permanent white smoke differs and the periodic-appearing smoke of the same color. Or, what is affected by black smoke from the exhaust pipe. The exhaust smoke of a bluish color also has its own unique causes of appearance. All these manifestations require a detailed analysis and analysis. We present to your attention the first part dedicated to the appearance of black smoke.


Before dealing with separate "pathological" states exhaust smoke, It should be understood, and what is generally exhaust, for which it is needed, and how it looks normally. As follows from the name, evaporation coming from the machine through the muffler are the product of the processing that appear during the kinetic motion of the engine and adjacent it. In simple language, it is a compound of steam from water, nitrogen and carbon dioxide that appears during engine operation.

Normally, with serviceable engine compartment, as well as an acceptable quality of consuming materials, this smoke is almost blunder, has an excess odor exhaust, and a certain density level. But as already mentioned a little earlier, sometimes we are witnessing the emergence of unusual smoke of another color (most often white, blue and black smoke from the exhaust pipe), often simultaneously with a deterioration in the car resource (or without it). What is the reason for these diagnostic manifestations, we will try to understand in more detail, after analyzing each of these smoke species.


Black smoke from the exhaust pipe and the cause of its appearance

This is probably the most "popular" question, all drivers, in which diesel, carburetor or injection engines are installed in the car. With such a manifestation there were many times the owners of old, used brands domestic production. But what is the reason for such an uncharacteristic evil evaporation, and why is it going black smoke from the exhaust pipe?

To begin with, calm and relieve panic - the appearance of black smoke, as a rule, does not indicate serious breakdowns in motor compartment. However, to expect that this problem is not able to cause damage later - a deliberately losing strategy. In essence, this is not a problem at all, but only one of the symptoms, the convenience of which is that it can be seen without a long digging in the components of the engine.


What signals the appearance of black smoke from the exhaust pipe? Depending on the type of engine and the state of the car, there may be several reasons, however, among them all the main and most likely, it is considered to be the interaction of the fuel and air mixture used. In practice, it looks like this: due to the oversaturated mixture, it cannot effectively turn into the engine cylinders, so that insufficiently recycled exhaust falling into the catalyst (and later in open air) along with the fuel surplus staining smoke into black.

At the appearance of such a smoke, the type of fuel does not affect the type of fuel, whether gasoline or diesel fuel, since the cause of the problem indicates breakdowns in the fuel supply system. In addition, sometimes black smoke from the exhaust pipe appears at startup, and later the smoke corresponds to normal as a dense. This is due to the fact that the fuel does not ignite in the chamber, and due to their dampness in the non-recycled form enters the silencer (as a rule, such an engine at the start strongly "Troit").


Remedy methods, as well as damage

There is a reasonable question "How to eliminate black smoke from the exhaust pipe?". For each type of engine, the answer will differ. A malfunction as it usually happens, damaged for the occurrence. In a carburetor type of ignition, the cause of black smoke is overflowing in a float chamber, which means for repair it will be necessary to clean the disassembled carburetor, change the jets, and set the indicator of the measured gasoline inside the combustion chamber.

Due to the absence of a float in the system with an injector, the reasons and elimination of them will be very different. Here the filming is responsible for the filing, or rather "injectors". It is they who have the property to clog and disrupt the fuel supply. Clean them can be manually or using cleaning additives to gasoline. Sometimes in black smoke from the exhaust pipe "to blame" malfunction Fuel pump (increased pressure). Unfortunately, the only elimination of this type of breakage lies in its full replacement.

What is the reason for the breakdown of diesel engines, because they are the greatest perpetrators and leaders on black smoke emissions into the air. To begin with, it should be said that the brainstorming products of the a priori will issue a darker color than gasoline analogs. But in order to eliminate this toxic threat and reduce the amount of lead in smoke, the diesel vehicles are installed "the particulate filter". Due to its malfunction, smoke may become darker, thicker, and contain the amount of toxins dangerous for the environment. The replacement of the particulate filter as a rule returns these testimony to normal.


Consequences of faults

As in any other case, it is able to bring a lot of problems in the future. Very often, in time, seen by smoke becomes the first and last warning before a serious breakdown. For example, in gasoline cars such a malfunction leads to a complete replacement of the catalyst. We have not written so long ago, about the pros and cons of the absent catalyst in our material. However, in any case, the replacement of such a device will no longer be cheap.

Even more fraught ignoring such a problem diesel cars. Since the pressure in the chamber using a similar type of fuel is even more than that of gasoline, the restenuation of the volume can cause a break of the supply unit, which will be repaired in a solid amount.

automotolife.com.

Black smoke from the exhaust pipe on gasoline or diesel: causes and solutions

  • How to solve the problem?


One of the most important conditions for the durable work of the car is the quality work of the power unit and the fuel system. If the engine is improved, the fuel consumption increases, its power is reduced, and various defects appear in the operation of the mechanical part of the vehicle. If you want your car to serve you faithfully for a long time, you need to constantly monitor the quality of all important components and spend timely maintenance. If the exhaust pipe of your car began to go black smoke, the factors that cause such trouble should know.

Why the soot of the pipe appears


The main source of this defect is partial combustion of fuel. At the same time, the particles of the unscrewed soot go through the exhaust vehicle exhaust system, polluting traffic fumes And preventing the normal operation of the vehicle. The main sources of black smoke from the exhaust pipe for the car with gasoline engine are:

  • Low quality gasoline. In such a case, the main part of the gasoline does not burn, and in the literal sense the word "crashes" into the pipe;
  • Problems in the functioning of the gasoline supply system. It is fed in a larger amount than is required;
  • Faulty or contaminated nozzles, gasoline is fed;
  • Incompatible additives and impurities in fuel with a type of power unit;
  • Injection sensors failed, gasoline is supplied in excessive amounts;
  • Depressurization of the block / s cylinder. In such a situation, do not do without overhaul.

In all cases above, there is an increased fuel consumption, the engine begins to work with interruptions, poorly starts, and the toxicity of exhaust gases increases significantly.

If you are a car owner with a diesel engine type, then for you the situation looks a little different. Do not forget that for some diesel power aggregates The appearance of black smoke from the exhaust system when starting or working on a cold - normal phenomenon. If, when the operating temperature range from the exhaust pipe continues to go smoke in black, it means that the problem is likely to be as follows:

  • Clogged airfield or inlet air path;
  • Loss of engine compression;
  • The inflation pressure control system is in a faulty state;
  • Zoom in the exhaust system;
  • The gas distribution phases are defined incorrectly;
  • The candle smelled;
  • Insufficient level Injection pressure of diesel fuel due to improper operation of nozzles or their inappropriate type;
  • High pressure pump is in a faulty state;
  • Unmounted not suitable type of TNVD;
  • The injection phase is adjusted incorrectly;

Black smoke from the exhaust pipe of the car with a diesel engine type is formed due to the partial combustion of the diesel fuel due to the lack of oxygen or excessive amounts of fuel. Air deficiency is most often caused by a blockage in the air filter. Less likely - this is incorrectly installed valve clearances, as well as wear cams distribution Vala. Also, the cause of the black soot can become an insolar with an insufficient cetane number.

How to solve the problem?


Conduct with a similar defect, as the smoke of black of the exhaust pipe can be one of the following ways:

  • Replace air filter;
  • Check the injector and inspection of nozzles;
  • Set the valve and ignition;
  • Clean the nozzles;
  • Measure the pressure in the cylinders.

You can not ignore a similar problem. Nothing forever, and all the elements of the car sooner or later require competent interventions, diagnosis and repair. Timely actions to eliminate black smoke from the exhaust pipe - the key to the long and high-quality work of your car.

Causes of smoke on a diesel engine:

autoshaker.ru.

Black Smoke Exhaust Pipe

The appearance of black smoke from the car's exhaust pipe should seriously alert the car owner. Soot says that the car can face the power system, the ignition system, the injection control, and the cylindaneous group. Depending on the malfunction, the SIZY smoke comes as a result of incomplete combustion of fuel, its incorrect burning or burning into the combustion chamber motor oil. Very often, the blue smoke begins to go with the start of the cold power and as herassing disappears. If there was no such thing before, then this is a reason to think about the technical condition of the engine and to diagnose in a good service center. If the black smoke does not disappear and on a heated motor, it should be prepared for the repair of the unit and the earlier refer to the specialists, the cheaper it will cost.

Fuel system malfunctions

Realcuting the fuel mixture arises as a result of a carburetor fault, an injector or high-pressure fuel pump at diesel. In this case, the SIZY smoke accompanied difficult starts, unstable work at idle, power loss and as a result of increased fuel consumption. The exhaust pipe smoke has a dark-gray or black color, especially well visible on a light background. In some cases, the black smoke coming out of the exhaust pipe can contain even visible particles of soot.

In vehicles with a carburetor engine, this malfunction often occurs due to the transfusion of fuel in the float chamber caused by stamping air jets, valve fault or irregular float adjustment.

W. injector motors This is due to malfunctions of sensors controlling the air content in the mixture or leakage nozzles. The leakage of fuel via nozzles can lead to a hydraulic impact when the engine is started. In large quantities, the fuel will not allow the piston to go through the upper dead point. It happens extremely rarely, but the consequences are very sad, up to breakdowns of the crank-connecting mechanism of the motor. Also, the fuel falls into oil leads to its discharge and as a result of increased wear of rubbing surfaces in the engine.

In a diesel engine, the main reasons for re-enrolling the mixture, and the appearing gray smoke arise as a result of the malfunction of the pump, the wrong occasion of the injection and also as in the injector leakage of the nozzles. Another reason, because of which there is soot in diesel enginesis the clogging of the particulate filters. Electronic systems Warning drivers about the need to replace the filter elements, but some craftsmen emit filter, and electronics are blocked using all sorts of decens. Therefore, such cars have a blue smoke can be the usual phenomenon that impede the diagnosis of the motor at the initial level.

Consequences of faults B. fuel apparatus There may be serious problems. As already mentioned this wear of rubbing surfaces as a result of oil dilution. Also as a result of the incessing amount of fuel in the cylinders, oil films are washed from the surfaces of the cylinder walls, which causes premature wear The cylindropional group in a rubbing pair. In case of incomplete combustion of fuel on the walls of cylinders and pistons, the soot is deposited, leading to the formation of scaling on the surfaces. As a result, all this leads to a decrease in the resource of the motor and the large cash costs for the repair of the car.

Oil hit in cylinders

The next main reason for the appearance of a siza smoke from the exhaust pipe is the ingress of oil into the engine combustion chamber. As a result of this malfunction from the car's exhaust pipe, blue or even black smoke appears. It all depends on the amount of oil in the cylinder. The main causes of oil entering the combustion chamber are:

Wear pistons leads to the fact that the oil from the engine crankcase through an increased gap enters the combustion chamber. There, the oil is burning, forming a gray smoke, and the part is deposited as soot and resinous sediments on the walls of the cylinders, increasing the wear of the motor.

Locking piston rings or their breakdown have the same consequences as the wear of the piston group. In this case, less expensive work on replacing the piston rings leads to the cost-maintenance of the engine. Over time, light gray smoke goes into blue, and then black, indicating the need for serious repair.

A visual example of how small repair moves to high costs is the wear or loss of the elasticity of the oil carriers of the engine valves. With this malfunction, the oil in large quantities remains on the rod and flows to the valve plates. In the inlet valves it is deposited in the form of a nagar leading to a loose fit and a possible breakthrough of split gases in the intake manifold. More worst consequences are in the exhaust valves. In this case, the valves can be due to the decrease in heat sinking ability, as well as the wear of the guides, the bend of the valve due to the incomplete closure and breakage of the cylinder head.

To understand the reasons why there is a blue smoke better entrust a good specialist, but the initial reason for the malfunction can be determined by itself. With a malfunction in the system of nutrition, the exit gray smoke is deposited on the walls of the exhaust pipe like soot or dry sump. In case of faults associated with the sediment lubrication system, as a rule, have an oily shape, and in extremely cases, oil as they say "flies from the pipe". In any case, when an exhaust pipe appears from the exhaust pipe, any unusual smoke should urgently understand the reasons and take non-real-to-elimination measures.

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Smoke from the release of the car serves as a diagnostic attribute and indicates the resulting malfunction in the engine. Let's talk about what is affected by the black and white color of the car exhaust.

Causes of white smoke

This is a normal phenomenon for the warm engine warming mode. Only it is not smoke, but couples. Water in the form of a pair - a sign of high humidity in the exhaust system. In hate exhaust system The moisture from the air is partially condensed and becomes visible, and water usually appears on the cutting section of the exhaust pipe. As the system warms the condensate and steam disappear.

At temperatures below 10 o with white pairs, it is formed on a well-haired engine, and when frost in -20-25 o with it takes a thick white color. So, the colder the environment, the more dense it is obtained by smoke from the exhaust pipe. In addition, the color and saturation of the pair affects the humidity of the air: the more she is more, the pairs are thick.

The appearance of white smoke on a heated engine Related to getting into cylinders of coolant. The water contained in the coolant does not have time to fully evaporate when combustion of fuel and forms quite dense smoke. white color. Its shade depends on the coolant composition, weather, lighting on the street. Sometimes he looks like a Sizem, reminding the "oil" exhaust. It is easy to distinguish water vapor: it is immediately dissipated, and after oil smoke in the air, a bluish fog remains for a long time.

It is not difficult to clarify that water is really thrown out of the exhaust, and not oil. To do this, on a well-haired motor briefly closed the hole of the muffler with a sheet of paper. Water drops from the leaf will gradually evaporate and will not leave obvious fatty traces.


Antifreeze can fall into the cylinder when damageing the laying, the formation of cracks in the head or block of cylinders. These defects in the engine work cause exhaust gas to the cooling system, which serves as the basis for recognizing the cause of smoke.

All problems associated with white smoke from the exhaust pipe require not only eliminating direct causes. Since defects are usually caused by the engine overheating, then you should check and eliminate the malfunctions in the cooling system - it is possible that the thermostat does not work, the fan power sensor, the fan itself, is a non-record radiator, its plug, hoses, or connections.

If the white smoke and the accompanying defects are noticed, then the car cannot be operated. First, defects quickly progress. And secondly, the operation of the motor on the water-oil emulsion sharply accelerates the wear of parts, and after a few hundred kilometers without major repairs it can no longer do.

Causes of black smoke

Black smoke from the muffler testifies to re-enrich the fuel and air mixture (fuel burns a lot). Consequently, about the faults of the power system, the ignition system or injection control system. It is well visible on a bright background and is particles of soot - the products of incomplete combustion of fuel.

The reasons:

  • Browned air filter (

Hello, guests and readers of our car blog. In this article, we will analyze such a problem as the appearance of black smoke from the exhaust pipe. What are the reasons for this phenomenon, what could be the consequences and how to deal with it.

Usually, all this is manifested in the form of a black dense exhaust, especially when pressed on the gas pedal. At the same time, the car can not work is not always stable: the engine is badly started, especially in winter, the motor "Troit", and increases fuel consumption.

It is worth saying that it does not mean a serious engine breakdown or other auxiliary systems. However, if you do not pay for due attention to the problem, you can, subsequently, soak the ignition system, fuel supply system and even the engine itself. After all, it is in these systems that the causes of black smoke from the muffler are licking.

What is the reason?

The main thing is what the black smoke from the exhaust pipe is talking about the oversaturated fuel-air mixture. A lot of fuel enters the cylinders, it does not have time to burn, and the exhaust is painted black. Of course, that it is more harmful and toxic than normal exhaust, and even the catalyst can not cope with the exhaust gases in exhaust gases.

The main reason for this is fuel supply problems. This problem may occur absolutely in all internal combustion engines, both in gasoline and in diesel.

The second reason lies in the ignition system. The fuel is not ignited in the chamber, and the muffler comes to the raw mixture. The engine, at the same time, it will be very strong "troit" (the engine troits - the motor is incorrectly running, since the fuel does not completely burn in any cylinder. For example, three cylinders work as it should, and the fourth is not quite so. Either there is no ignition, either fuel burns badly).

Carburetor ignition.

Concerning carburetor engines, then everything is quite simple. If the black exhaust, most likely, the carburetor itself works unstable, namely overflowing in a float chamber. There may be several reasons:

  • The needle valve is faulty. "Igelka" can pass the surplus of fuel, it is alleged at all.
  • Gyps could clog out. The main reason for this is low-quality fuel.

To resolve the problem, you need to disassemble and clean the carburetor. If it does not help, you will have to change the "needle" and jets, and then correctly set the level of gasoline in the chamber.

Injector motor.

On the one hand, everything is easier here, since there are no "needles" and combustion chambers. And on the other hand, it is more difficult, since there is an absolutely different fuel supply system. Here the fuel-air mixture is supplied using electronics, and the injection is carried out using "Injectors". Hence the engine name.

The main causes of black smoke from the exhaust pipe on the injection engine are as follows:

  • The main problem here is the injector itself. Simply, it is clogged and does not apply like fuel. Pressure accumulates, and then there is a strong injection, often with excessive fuel. Because of this, the engine is unstable, it begins to "swim": then low speed, then high. To fix it, you need to clean the injectors. There are several ways to do it. You can remove the fuel rail, and you can use special meanswhich are added to gasoline. What is better - to decide, of course, you, but it will help get rid of the black exhaust. The procedure is better to spend every 70,000 kilometers.
  • Since the injection engine system is fully automated, then with sensors, it monitors all different operation cycles. From this it follows that the sensor is faulty. If so, he either will serve too much fuel, or will not allow the engine at all. It is unlikely that you can reveal this breakdown yourself, you will have to go to the diagnostics to a hundred.
  • The third reason is the fuel pump. In car injection engines, it is usually located in a gas tank, and there are cases that it begins to submit increased pressure. This leads to overflow in injection chambers. The solution to the problem is to replace the pump.

Diesel engines.

If you look, then for a diesel engine, black exhaust is a normal phenomenon. Again, here is another system, fuel flammable from pressure, it works on the diesel fuel, and it gives a slightly blacknous exhaust even in normal condition. But today they are trying to fight this phenomenon, because the exhaust of the diesel engine is toxic and contains a lot of lead. Therefore, to comply with EURO5 standards, alloy-haired filters began to install on all diesel engines. It cleans exhaust gases and does not give harmful substances to air.

And what problems can diesel engines?

  • Banal output of the scene filter. If so, it needs to be replaced. But the intensity of smoke will be not so high.
  • The high pressure pump failed and overflowing fuel. Again, everything is solved by replacing it.
  • Incorrect ignition advance angle. Here you need to adjust everything correctly.

What does the black smoke from the exhaust pipe lead to?

So that in the future there is no serious breakdown, take action anyway. For example, if it happens a big overflow through the injectors, it can also lead to the hydrodar, because the fuel is usually supplied as in the air mixture, and then liquid will fall. This will lead to complex and expensive repairs.

Also, if you do not fix the black exhaust injector enginesmay fail the catalyst, replaced which will be expensive and difficult. Some, after that, do not put it at all.

In diesel engine, due to a large amount of fuel, can break the block. After all, the pressure is even more there than in gasoline engines.

Well, from this article it follows that in itself the black smoke from the exhaust pipe is not so dangerous. However, if you do not react to the problem on time, everything can pour out in a large problem. Therefore, you do not need to pull, remap the desired systems, clean and adjust the parts. After all, if you look after the engine, it will last a very long time. Good luck to you!

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