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When the car is moving, the engine exhaust pipe emits blue smoke.
Cause of failure: Blue smoke or gray smoke is emitted from the exhaust pipe when the engine is running, which is mainly caused by the oil jumping into the cylinder combustion chamber to participate in combustion. Removing the spark plug can reveal serious carbon deposits, high oil consumption, and mostly oil channeling into the combustion chamber. When the oil enters the cylinder, it is heated and evaporates into blue oil and gas, and the exhaust gas is discharged out of the cylinder, and the blue smoke will be observed at the exhaust pipe mouth.
The main reasons why the oil jumps into the cylinder are:
Worn cylinders or poor piston ring seals cause crankcase oil to jump up into the combustion chamber.
The oil pan oil level is too high or the oil pressure is too high, causing too much oil to adhere to the cylinder wall.
Worn valves and valve guides cause too large fitting clearances and oil is sucked into the combustion chamber.
The air filter oil level is too high or the filter element is severely clogged, allowing the oil to be sucked into the combustion chamber.
Fault diagnosis and troubleshooting
If the engine has been used for a long time or has reached the specified overhaul interval mileage, and the engine power is insufficient, the main reason is that the piston and piston ring are seriously worn, and the oil is jumped due to poor sealing, and it should be sent to the automobile repair shop for overhaul.
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Needless to say, burn engine oil at high speed. Explain what it means to burn engine oil at high speed. There are two ways to burn engine oil.
When the piston in the cylinder barrel can be sealed with the cylinder liner at the bottom and the top, the valve oil seal burns the engine oil. However, if there is internal wear between the liner and the piston, the oil will be burned directly in the combustion chamber. At this time, you can't see the blue smoke.
In the case of a case like yours, it is estimated that the valve oil seal burns the oil on a large surface .
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It's starting to burn the oil, and it's going to be overhauled at the end of the year.
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First, this phenomenon caused by the dirty throttle valve of the vehicle, it is recommended to clear the throttle valve of the vehicle engine, and then re-do the matching of the knot and the lead valve, the vehicle intake system has the phenomenon of air leakage caused by this failure, this is the focus on checking the relevant vacuum pipeline and carbon canister solenoid valve Third, the phenomenon of excessive carbon deposition inside the engine is good, this is the need to clean up the carbon deposition of the intake duct and the carbon deposition of the valve base and the three-way catalytic converter. Fourth, the vehicle engine exhaust system failure, this focus on checking the exhaust valve, if the exhaust valve is damaged, it needs to be replaced in time. Fifth, the vehicle engine has a lack of cylinder failure, show this focus, check the ignition coil and spark plug, if there is a problem, you need to replace it in time!
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Summary. This is mainly due to the poor combustion of the engine, which caused this phenomenon. It is necessary to clean the throttle and injector, replace the spark plug, and then check the pressure of the gasoline pump to see if it is normal, and also need to check the injection pressure of the injector, including checking the atomization effect of the injector.
There is also a need to use a computer to detect the ignition advance angle of the engine to see if there is a problem, these aspects need to be specifically checked, which will lead to the engine emissions are not up to standard, carbon monoxide exceeded.
This is mainly due to the poor combustion of the engine, and the phenomenon of this old breed has appeared. It is necessary to clean the fuel injector and fuel injector, replace the spark plug, and then check the pressure of the gasoline pump to see if it is normal, and also need to check the fuel injection pressure of the fuel injector, including checking the atomization effect of the fuel injector. There is also a need to use a computer to detect the ignition advance angle of the engine to see if there is a problem, these aspects need to be specifically checked, which will lead to the engine emissions are not up to standard, carbon monoxide exceeded.
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Summary. Dear, hello, I am very honored to answer for you, in this case, first check whether the air intake is insufficient, mainly to see whether the air filter is blocked, whether the air flow meter is damaged; Check the working condition of the fuel injector to see if it is caused by the poor atomization effect of the fuel injector, and also pay attention to the fuel quality; Lack of cylinder, that is, the engine has a cylinder that does not work or does not work well, check the working condition of each spark plug and ignition coil, whether the spark plug has not been replaced for a long time, this phenomenon is generally accompanied by the violent shaking of the engine and insufficient power, and it is also a more common failure; Check the cylinder pressure, whether there is air leakage, whether there is too much carbon deposit in the valve or combustion chamber, etc.;
Thank you. Dear, hello, I am very honored to answer for you, in this case, first check whether the air intake is insufficient, mainly to see whether the air filter is blocked, whether the air flow meter is damaged; Check the working condition of the fuel injector to see if it is caused by the poor atomization effect of the fuel injector, and also pay attention to the fuel quality; Lack of cylinder, that is, the engine has a cylinder that does not work or does not work well, check the working condition of each spark plug and ignition coil, whether the spark plug has not been replaced for a long time, this phenomenon is generally accompanied by the violent shaking of the engine and insufficient power, and it is also a more common failure; Check the cylinder pressure, whether there is air leakage, whether there is too much carbon deposit in the valve or combustion chamber, etc.;
Fuel injector, spark plug, oil pump replaced, normal idle speed, black smoke from rapid acceleration.
Black smoke during rapid acceleration is generally caused by the following three reasons. 1.One is the air flow meter; 2.
the second is the oxygen sensor; 3.The third is mixed vapor thickness. Since you have maintained the oil circuit, you can unplug the plug connector of the air flow meter and test it, and there will be no or less black smoke, which is the problem of the air flow meter;
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The cause of white smoke may be: moisture in the fuel or moisture in the muffler.
The cause of the black smoke may be: the mixture is too thick.
The causes of blue smoke may be: the oil level is too high; The cylinder compression pressure is lower than the specified value; The gap between the piston, piston and cylinder barrel increases.
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The unpleasant smell is caused by the failure of the catalytic converter. White smoke may indicate that the engine is worn out or that the timing belt is elongated.
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The failure of blue smoke emitted from the exhaust pipe is mainly caused by the following reasons.
Clause. 1. The use of unqualified engine oil, or the engine oil has not been replaced for a long time, the reason is that the engine oil is too thin and the combustion is not sufficient. The solution is to replace the qualified one. Oil. Clause.
Second, the cold car is caused by the start of the big throttle.
Clause. 3. The quality of the gas mixture involved in combustion is not good, or it is caused by the aging and damage of the filter and the failure to replace it.
Clause. Fourth, the catheter and valve are worn out in the process of working, so that the gap between the two is too large, and in the process of air intake, excess oil in the rocker chamber is sucked into the combustion chamber for combustion.
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Blue smoke is the manifestation of burning engine oil, but if you go to 140 suddenly, this is a problem of your engine's affordability, when your car reaches high speed, the piston ring contact with the cylinder wall is not very bright and sealed, indicating that the cylinder liner of the car is worn; There is also a situation that occurs if you increase the throttle too hard. The exhaust smell is strange, which is the performance of the early stage of burning engine oil. If you still don't want to have your engine repaired, I suggest you buy a bottle of engine protection fluid, which will be much better.
Your car should have a good chain for a few years, and it has not been a second warranty for a long time (this will happen during the run-in period), you should pay attention to these, and maintain and inspect them frequently.
Wishing you a safe journey!
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