Typically, the exhaust emissions for new cars do not need to concern. But, after several years of use, you certainly concerned with exhaust smoke gray and black. This shows there is wrong on your car engine parts, especially karburator.
Actually by looking at the color of exhaust smoke, you can examine the processes that occur in the combustion cylinder.
Among those who should be given attention by answering your questions is as follows:
First, does your car do not smoke or slightly blue color. If this happens, you should be relieved because it shows the process of combustion ratio compares well with the gasoline-air mixture is correct.
If you smoke, yellow or brown, which means very little in petrol (a mixture of too little).
What if black smoke? This means that the combustion process occurs that is not perfect because too many in the petrol. Smoke that comes out white or slight hint of blue also means lubricating oil per burn. In cold conditions usually also white exhaust smoke because of water vapor; situation like this, however common in each engine.
In the black exhaust smoke, there are several possibilities that can lead to conditions that occur, including air filter clogged, the air valve (choke) and closed karburator damaged.
To overcome this problem, first check whether the air filter clogged. When the engine moves, Open air filter. If the method is high and increases engine rotation is no longer black smoke, then clear the air filter dirty. Clean the air filter.
In addition check whether the air valve (choke) closed. If not closed or fully open when the engine is hot, it will cause excessive air-gasoline mixture. To check the situation, Open air filter and look karburator from above. If choke does not open fully, straight position.
Black smoke because karburator damaged. If this happens, bring your car to the workshop.
White exhaust smoke when too much lubricating oil flows into the fuel space. This happens because the piston, piston rings, cylinder walls, valves and valve damaged routes.
Lubricants can also enter the space if the fuel in the cylinder head gasket is damaged so that water can enter the space fuel. Water vapor that occurs because heat will go out with exhaust smoke cause white smoke.
However, usually can be distinguished between white and white steam as a result of oil lubricants. Vapor lubricants white and produce a certain smell.
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