What indicates a blackish exhaust smoke of the main engine?

What indicates a blackish exhaust smoke of the main engine?

Black smoke indicates that the fuel is not burned properly. The internal combustion process in diesel cars requires a certain mixture of fuel and air. The EGR helps to re-circulate the engine emission by returning them to the combustion chamber and not sending them directly to the exhaust emission system.

What fault causes black smoke from exhaust?

Black exhaust smoke simply means that your engine is burning too much fuel. Engines need both fuel to burn and oxygen to burn it with. If there’s too much fuel in the combustion chamber and not enough oxygen to burn it with, it can cause black smoke to come from your exhaust.

Why is my gas engine blowing black smoke?

Black smoke from your exhaust Black exhaust smoke simply means that your engine is burning too much fuel. If there’s too much fuel in the combustion chamber and not enough oxygen to burn it with, it can cause black smoke to come from your exhaust. …

What does it mean when you have black smoke coming from your engine?

Black smoke indicates an engine air-fuel mixture that is too rich — meaning there’s too much fuel and not enough air. This is typically caused by one or more of the following problems: Faulty fuel pressure regulator: As the name implies, this device regulates fuel pressure to the engine.

Why do I have black smoke coming from my tailpipe?

If there is a lack of of air coming into the engine, the fuel will be burnt partially then leads to black smoke from tailpipe. Fuel needs to be burnt fully as it will only emit CO2 and water, which do not cause black smoke. That is why the correct combination of fuel and air is so important if you want to avoid black smoke.

What does smoke coming from the back of a car mean?

But if something is amiss, you’ll see a cloud of smoke coming out of the back of your car. There are three common colors of exhaust smoke emitted from a gasoline-powered engine: Black smoke indicates an engine air-fuel mixture that is too rich — meaning there’s too much fuel and not enough air.

Where does the smoke come from in an engine?

Many engine problems create abnormal or excessive exhaust smoke. In your engine, fuel is burned in each cylinder, creating exhaust gases. These gases exit through valves in the engine and then flow through the exhaust manifold and into the exhaust pipes.