According to the car service center, excessive smoke is a harbinger of severe problems that can degrade motor performance and even breakdowns. There are such breakdowns, the symptoms of which is noticeable smoke:
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Violation of adjustment or malfunction of the fuel supply system, carburetor, injector, fuel filters.
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Because of wear on rings and pistons, leading to loss of compression.
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Issues with the regulations of the fuel circulation system.
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Deterioration of collapse of engine cooling system.
What the color of the exhaust can say
By the nature of the exhaust gases color and using car repair apps for Android, one can easily conclude the following violations in the engine operation:
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Black exhaust - combustible blend re-enriched with fuel;
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Grey exhaust - oil entering the combustion chamber;
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White exhaust - coolant entering the cylinders.
One of the primary reasons for the appearance of the black exhaust is the too rich fuel mixture. An excess of fuel enters the cylinders and is unable to burn out during the engine cycle entirely. Unburnt fuel products are emitted through the exhaust pipe in the form of soot particles. The reason behind malfunction may lie both in the injection system and in the ignition system.
Generally, an over-enriched combustible mixture results from a heavily soiled air filter, which causes a significant shortage of combustion air. Maybe the malfunction lies in the incorrect operation of the injectors, and it is associated with the ineffective atomization of the mixture or "overflow" of fuel. In addition, black exhaust fumes are also accompanied by unstable motor performance and power loss.
The exhaust gases' untypical bluish or white color depicts the presence in the cylinders of those parts that ensure the engine's functioning. However, under general circumstances, they remain isolated and avoid participating in the combustion process of the fuel composition. Such things become possible if the tightness of one of the engine circuits - oil or cooling - is malfunctioning.
When foreign liquid enters the engine's cylinders, its combustion elements also provide the exhaust gases with an appropriate colour. So, for example, engine oil waste is accompanied by the blue exhaust, and thick white smoke from the pipe is an outcome of coolant entering the combustion chamber.
Whitish or clear smoke from the exhaust pipe
The appearance of white smoke from the exhaust pipe is a regular occurrence when the engine is cold. However, it should be taken into account that this is not smoke but steam. Water in a vaporous state is a natural product of fuel combustion. Such a thing is normal and does not need any particular action. The fact is that in a cold exhaust system, steam because of fuel combustion partially condenses while becoming visible. This causes the appearance of water (condensate) usually appearing at the edge of the exhaust pipe.
At temperatures below -10 degrees Celsius, white steam is formed on a well-warmed engine, and at -20... -25 degrees of frost. As the components of the engine warm-up, condensation decreases. The colder the conditions, the denser, whiter, and more visible vapour appears. The exhaust, because of smoke, acquires a thick white color with a bluish tint.
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