What color smoke is unburnt fuel?
White smoke
White smoke is caused by raw, unburnt fuel passing into the exhaust. White smoke smells and will often sting your eyes, which is the effect from raw diesel.
What Colour is fuel smoke?
Blue/gray exhaust smoke means there’s likely an oil leak and your engine is burning oil. Time to have a qualified technician check things out. The leak could be caused by several issues like leaking valve seals, damaged piston rings, or worn cylinder walls.
Why is there blue smoke coming from the exhaust pipe?
Blue Smoke From Exhaust When Accelerating. When blue smoke is emitted from a car’s exhaust pipe, this usually indicates that a leak in the engine’s valve seals is allowing oil to leak into the combustion chamber where it is being burned along with the fuel.
What does Blue Smoke mean on a car?
Blue smoke is never a good sign and it can indicate many different problems with your car. The good news is if you spot it early and act upon it right away, these problems can be fixed. It is important to understand what blue smoke is, why you see it coming from your exhaust and the most effective ways on how you can fix this problem.
What does it mean when smoke comes out of car exhaust?
But if you notice any coloured smoke coming out of the exhaust then it could be a hint that a mechanical problem could be waiting in the wings. The colour of the smoke that comes out of your car’s can mean different things, and is an indication of what might be wrong. Read on for details that might be worth looking out for.
What does white smoke from a diesel engine mean?
White smoke also needs to be checked immediately, because it can be a sign that your engine is on its last legs. For diesel cars it can mean that the engine timing isn’t right, that there’s a fault in your fuel injection system, or that the engine is overheating. And if you drive a petrol car and see white smoke, it’s really not good news.
What does it mean when your car has blue smoke from the exhaust?
If you are seeing Blue Smoke From Your Exhaust this means that your car engine is burning oil. It really does not smell very good and is not good for your health to breath in. This smoke should not be confused with White Smoke you will see when a car first starts up.
What to do if you get Blue Smoke in your engine?
Recommendation is that if one is bad, all should be replaced at the same time. If Blue Smoke appears all the time your engine is running then the first thing to check is the PCV (Positive Crankcase Ventilation) Valve. If pressure builds up in the Oil Pan, the PCV Valve allows this pressure to release.
What causes blue smoke from the intake manifold?
The Intake Manifold is also connected to your engine Air Filter. If the PCV Valve gets stuck open then it will keep mixing the air with oil and other gases from inside the engine. The oil gets mixed with the Gasoline and Air and gets burnt creating the Blue Smoke.
Why do I have white smoke coming out of my exhaust?
Here are the different kinds of white smoke that your exhaust may be generating and what it may mean. If you have light white smoke coming out of your exhaust, you’re probably okay. This may just be due to condensed water vapor and is very common, especially when starting your car for the first time on a cold day.