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dchemphill1
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Under warranty....go get it looked at!
jjvincent
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When you say "black soot" is this for the exhaust fumes or just what the tail pipe looks like?
JP29
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I was going to say, doesn't seem uncommon to collect a black ring around the tailpipe mouth. I know mine has but the exhaust otherwise seems fine when expelled and no issues when running.
J.Ferreira
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That’s extremely common for a small turbo, high compression, direct injection engine.
If there was no soot at the exhaust tip…then I’d be worried.
If there was no soot at the exhaust tip…then I’d be worried.
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limeade
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Completely normal, nothing to worry about. If it's spitting out an oily substance, then you'd want it to get checked.
jjvincent
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Then it's just like every other modern car out there. My VW has soot and same for my BMW. Both are DI motors (which seem to have more soot). It's really pronounced on the VW as it has chrome tips on it from the factory. As for the BMW, they got smart and made the tips black. As for my Jeep, I had to look at it as the tip is a bit hidden.
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Little off subject I know. Why on earth was the factory muffler engineered with that pinch point in the bend that gets excessively hot and restricts flow?
ALeeL
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The soot is there due to being a direct injected engine. With port injection, the fuel is injected into the cylinder on the intake stroke and therefor has more time to mix with the air. With direct injection, the fuel is injected on the compression stroke so it does not have as much time to mix with the air properly. This means the exhaust in direct injected engines have more unburned fuel than port injected engines which is soot just like a direct injected diesel.
The difference between gasoline directed soot and diesel soot is that the particulate matter is smaller and cannot be seen like diesel soot when they "roll coal". So every gasoline DI engine "rolls coal" just like diesels, especially when the engine is cold, but the particles are so small that they are not scene by the naked eye. This is actually not a good thing because they are small enough to get into your bloodstream and hide in more places in your lungs unlike the much larger diesel soot.
The difference between gasoline directed soot and diesel soot is that the particulate matter is smaller and cannot be seen like diesel soot when they "roll coal". So every gasoline DI engine "rolls coal" just like diesels, especially when the engine is cold, but the particles are so small that they are not scene by the naked eye. This is actually not a good thing because they are small enough to get into your bloodstream and hide in more places in your lungs unlike the much larger diesel soot.
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