Car exhaust smoke is white and particularly pungent, why?

There are two reasons for this:

1. Inferior fuel oil filled with water, sulfur and phosphorus compounds and other harmful substances that are not conducive to full combustion of the engine; After the engine is started, the air-fuel ratio is less than the normal value, which is easy to deflagrate and the temperature is abnormal, and the engine emits very pungent sulfur compounds and hydrocarbons.

2 If the fault still exists after the fuel problem is ruled out, check whether there is a fault in the engine itself (focusing on the air intake system and fuel injection system), use the decoder to read whether there is a corresponding fault**, and read the data stream to observe whether there is any abnormality.

Fault performance: When the car is on, a large amount of white water vapor can be seen coming out accompanied by unstable engine operation, even if the engine is preheated to reach the normal working water temperature, a large amount of water vapor is still coming out (except in winter).

Cause of failure: It may be due to the wear of the cylinder gasket of the engine cylinder, which produces a certain gap, resulting in a large amount of water from the heat dissipation system entering the combustion chamber. Water cannot be burned, and when heated, water vapor is generated, which is discharged directly from the exhaust pipe.

Solution: Check whether the engine block and head gasket are damaged, and check whether there is water inside the fuel tank; Use properly marked gasoline.

PS: There will be a small amount of white exhaust gas coming out when the car is warmed up at normal low temperature, and the white smoke will disappear naturally after the car is warmed up, which is a normal phenomenon of cold and heat exchange.

There are three main reasons for the white smoke of the car, the first one, we all know that the exhaust gas of gasoline after complete combustion is mainly carbon dioxide, water vapor and a small amount of pollutants, and we are in the stage when the car is just on fire, the inner wall of the exhaust pipe is cold, at this time the car starts, the exhaust vapor meets the inner wall or the exhaust pipe is cool, it will quickly condense into water mist and be discharged, and then it becomes the white smoke we see. Moreover, most of the exhaust gas has been atomized into water mist in the exhaust pipe, and a small part continues to condense in it and becomes small water droplets, so what we see behind the car is basically white smoke. And we have also seen the dripping situation in the back of the car in our daily life, that is, the gas continues to condense in the exhaust pipe, and the accumulation is too much and flows out of the exhaust pipe, this phenomenon is normal, do not worry.

The second situation is that water enters the cylinder of the car, and when we drive, the water turns into water vapor when it heats up, which is discharged from the back of the car and becomes the white smoke we see. This situation is more serious, it may be that the cylinder gasket of the car is damaged, and the cylinder block and cylinder head are not tightly sealed, resulting in the waterway running up and down, and the water flows everywhere between the cylinder block and the cylinder head, so that the air bar enters the water. There is also a possibility that the cylinder gasket is broken, because the cylinder is sealed against the cylinder head gasket, and if the cylinder gasket is damaged, it will also cause coolant to flow back and forth between the cylinder block and the cylinder head.

If the car emits white smoke because of this situation, we need to replace the cylinder head gasket in time to ensure the cylinder seal, but the maintenance cost is higher, the time is longer, and it is more troublesome. It is also very easy to judge this situation, just observe whether the car continues to emit white smoke after driving for a period of time, if so, it proves that our car has a problem and needs to be repaired in time.

The third reason is mainly the excessive water content in gasoline. This situation is mainly related to unscrupulous gas stations, when the car is no longer the product of complete combustion of gasoline, but gasoline with water. Similar to the second case, the water passes through the high temperature in the car and turns into water vapor and is discharged from the exhaust pipe, resulting in a large amount of white smoke.

This situation only requires us to replace the gasoline in time to solve the problem, and it is also very easy to judge, usually mixed with water gasoline can be felt when we drive, acceleration weakness, power decline, climbing effort are caused by gasoline mixed with water, and this situation generally only occurs in some small, irregular gas stations, we can rest assured that we refuel daily.

Of the above three reasons, only the first one is normal, the second one generally occurs in a car that lasts for a long time, and the third one is not common.

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

Hello friend, if you have white smoke from this exhaust pipe, it is caused by your excessive fuel injection. This must be leaking, and the gasoline is not burned out, resulting in that white smoke situation. If the problem is caused by the leakage of the fuel injector, this solution will need to be replaced, and the fuel injector will solve your fault.

Just remove the injector and replace it, friend. It's all the problems caused by the most leaks of friends.

Questions. Does it have anything to do with the cylinder gasket?

If this oil leakage or oil leakage is caused by the fact that your cylinder head gasket is not pressed, it must be the fault of the cylinder head gasket. Repair, that is, replacing the cylinder head gasket to solve your problem.

Questions. And does it have anything to do with turbines?

What the hell is the problem?

It doesn't have much to do with turbocharging, friends turbocharging is no problem. The main problem is the fuel injector. The main problem is the fuel injector. And you this head gasket leaks.。。 These two issues will cause this failure to occur.

Fuel injector leaks, you smell this white gas now, does it smell of gasoline? If there is a smell of gasoline, it is a leak from the fuel injector, and if there is no smell, it is a problem caused by the head gasket flushing out.

Questions. It has nothing to do with turbine damage.

It has nothing to do with turbocharging, which doesn't cause you to smoke in this situation.

Questions. You mean injector failure.

Can it be detected with a computer?

That's right, the probability of failure of the fuel injector is very high, friend. If you smoke with this smell in it.

The computer can't detect it, and the computer can't detect whether the fuel injector is leaking. You can only see it by removing it for testing, and the fuel injector nozzle. Is there a problem with the leak?

If I can help you, please give me a thumbs up Thank you!

It is because the exhaust gas from the exhaust pipe is at a high temperature or because the engine piston is broken, so the oil starts to burn, and the smell is particularly pungent.

It could also be due to carbon build-up in the engine, oil confusion, or exhaust failure.

It shows that the temperature of the exhaust pipe of the car is high, so white smoke is produced, which is generally called liquefaction. will have a pungent taste.

There is a high probability that the relationship between the inferior fuel is added, and if these are added, it is very unfavorable for the engine to fully burn, and a large number of harmful substances will be produced.

It should be that there is a big problem with the engine. During the combustion of the engine, the machine malfunctioned. That's why this anomaly occurs.

It is because the engine is not cared for for a long time, so it often rubs during driving, which is easy to cause these smokes.

This happens because the engine burns badly and the spark plug is clogged.

It is that the engine burns badly, so in such a situation, you should go to the 4S shop to check your vehicle.

It may be that the engine does not burn enough, which can lead to such problems. You should find a 4S shop to overhaul it, and you can find this kind of problem.

Causes of white smoke from the exhaust pipe of the car: 1. When the car has white smoke from the exhaust pipe, it may be because the air filter of the vehicle is stained, resulting in insufficient air intake, or it may be because the carburetor is faulty, or the oxygen sensor in the exhaust pipe is polluted, resulting in the computer being unable to provide correct information to the gas distribution.

2. Normal white smoke is due to the exhaust gas in the exhaust pipe, and when the temperature of these exhaust gases reaches a certain layer, it will condense into water droplets; When the engine is running, the exhaust pipe discharges a large amount of water vapor and white smoke, and it is necessary to check whether there is water in the fuel tank, check whether the cylinder gasket is damaged, whether the cylinder block is cracked, and whether the cylinder liner sealing ring is good.

3. The high temperature in the cylinder will also cause the gas to enter the oil pan, which will cause the oil to deteriorate, which is a very common situation, so it must not be too much or too little when adding the oil. Under normal circumstances, the exhaust gas is just water vapor, but with the influence of high idle speed of the cold car, the water vapor will also appear white smoke. In fact, the phenomenon of white smoke is relatively easy to do, as long as there is no black smoke or blue smoke.

4. White smoke appears when the cold car starts, and as the temperature of the engine rises, the phenomenon of these white smoke disappears, so the white smoke in this situation is because the engine of your car burns very fully, and the white smoke produced by hot steam encountering cold air is a normal phenomenon. In winter, due to the low temperature, it is normal for the exhaust pipes of cars on the road to emit white smoke. If your car still emits a lot of white smoke at normal temperatures, go to a professional repair shop to check it out and solve the problem as soon as possible.

Answer: The reasons for the white smoke emitting from the exhaust pipe of the vehicle are: 1. Stains on the air filter; 2. The oxygen sensor in the exhaust pipe is polluted. The exhaust pipe is a part of the engine's exhaust system, which includes the front exhaust pipe and the rear exhaust pipe.

The exhaust system is to discharge the exhaust gas generated by the engine work, and at the same time reduce the exhaust gas pollution and noise, which is composed of an exhaust manifold, a catalytic converter, an exhaust temperature sensor, an automobile muffler, and an exhaust tailpipe.

5. White smoke from the exhaust pipe is absolutely abnormal. It is best to detect the following reasons, otherwise the exhaust pipe will emit steam outward for a long time, which will cause corrosion to the exhaust pipe and cause rust damage in advance.

During the cold start, a large amount of white smoke suddenly comes out of the exhaust pipe. This situation is normal, because there is too much moisture in the gasoline during the cold start of the car, so the water will evaporate after starting, resulting in a large amount of white smoke in the exhaust pipe, we only need to heat the engine sufficiently, and the white smoke will disappear;

What is the matter with the white smoke from the exhaust of the car and it is particularly pungent, in this kind of emotional situation, if it is just starting, because the gasoline in the engine is not completely burned, the gas discharged by us is white. Since the three-way catalytic width has not yet been heated at the beginning, it is said that this situation will occur. Another situation is that you can't get up anymore, it's been a while, and it's still white smoke.

Then we should focus on checking our steel pressure to see if our piston ring is damaged or damaged. Automobile master gold medal technician to serve you, we uphold the service concept of concentration, careful service for you, if you don't understand anything can ask me questions.

<> "What's going on with white smoke from the exhaust fumes?"

In the process of using the car, we may encounter various problems after a long time, such as the white smoke from the exhaust of the car and the pungent smell. So what's the deal with the pungent white smoke from the exhaust?

It is likely that the air filter element is not replaced in time, resulting in the blockage of the air filter, which will produce a large amount of white smoke when the exhaust is discharged, and there will be a very strong pungent smell.

It may also be that the three-way catalytic converter of the car is faulty, if the three-way catalytic converter is blocked or damaged, it will not be able to filter the exhaust gas of the car, and there will be a pungent smell when combusted.

If the engine has just been overhauled, it is normal for the exhaust to emit white smoke, and it is recommended to observe after a period of running-in, and it should improve after running-in.

In addition, it should be noted that if the white smoke from the engine just after the overhaul is particularly large, and the ambient temperature is not low, this may be the reason why the ignition timing is too late, which should be checked again by the maintenance technician.

<> "If there is white smoke in the exhaust and the smell is more unpleasant, it may be a problem with the three-way catalytic converter, or it may be a problem with the engine temperature, and it may be a problem with the quality of the fuel, we can investigate and solve it according to the actual situation, and if you can't deal with it, you can go to the repair shop or 4S shop."

What to do if the smell of car exhaust is very pungent.

1. It may be because of the problem of the three-way catalytic converter of the car. The three-way catalytic converter is mainly used to control automobile exhaust, which can help to discharge relatively environmentally friendly and less polluting exhaust gas. However, the three-way catalytic converter needs to be replaced regularly, and if it is not replaced at the end of the time, its effect may be reduced, resulting in a pungent exhaust gas.

In this case, we can go to the repair shop or 4S shop to replace the three-way catalytic converter of the car.

2. It may be a problem with the temperature of the car engine. If the car engine is relatively cold when it starts, then it is possible that during driving, the system will increase the efficiency of the engine in order to make the temperature of the engine rise rapidly, so the pungent smell in the car exhaust will also appear. In this case, we don't need to carry out maintenance, and the car will return to normal after a period of noise, especially in winter, when using the car, you can warm up the car first.

3. It may be that the quality of the car fuel is not good. Car exhaust is directly related to gasoline, if the quality of gasoline is not good, then the emission of car exhaust will become pungent. In this case, we can choose to change the gasoline and go to a regular place to refuel.