Black smoke is a sign of a vehicle running rich. I would check for a bad fuel pressure regulator, bad fuel injector or very plugged air filter.
A fuel pressure test could tell you much.
Could be a diesel? If not then replace your oxygen sensor on your exhaust. A bad oxygen sensor causes the exhaust smoke to be dark in color.
Black smoke coming out of the exhaust of a car is usually due to oil being burned in the engine's cylinders. This can be caused by a worn piston ring or rings.
It is buring oil this is a wrong answer whe engine burn oil to the exhaust smoke is a heavy white smoke no black
In most cases white smoke means you are burning gasoline inefficiently, black and gray are usually oil, however, that's the extent of my knowledge.
If black smoke is coming out of the exhaust of a 1986 Ford Ranger, it is likely burning oil. It's possible that a seal is leaking in the engine.
how can i get black exhaust smoke stuck on my dual exhaust
white smoke is coming from my exhaust why?
Due head gasket worn out
emissions and exhaust
02 sensor
the smoke that comes out of a exhaust pipe is supposed to be white
Black smoke is a sign of an overly rich fuel/air mixture, unlike blue smoke which is a sign of oil burning. Seek professional help.