Black smoke is an indication of an overly rich fuel/air mixture.
sounds like a stuck fuel injector
how can i get black exhaust smoke stuck on my dual exhaust
emissions and exhaust
It is buring oil this is a wrong answer whe engine burn oil to the exhaust smoke is a heavy white smoke no black
Oxygen sensor
Service engine
You have a glow plug failing. The black smoke is unburned fuel.
unburnt fuel
Unburnt fuel.
Black smoke from the exhaust it a symptom of an overly rich fuel/air mixture. Have this repaired or it will destroy your O2 sensor and catalytic converter.
Depends on the color of the smoke. Blue smoke-oil. Black smoke-unburnt fuel.
check ditributor cap and rotor and spark plug wires