1. Black Smoke:
- Indicates a rich fuel mixture, meaning there's more fuel than the engine can efficiently burn. This can be caused by a faulty fuel injector, a clogged air filter, or a malfunctioning oxygen sensor.
2. White Smoke:
- Usually caused by a coolant leak in the engine. When the coolant mixes with the hot gases in the combustion chamber, it turns into steam and comes out as thick white smoke from the exhaust.
3. Blue Smoke:
- Indicates an oil leak in the engine, likely from worn piston rings or valve seals. When the engine burns the oil along with the fuel, it generates blue smoke.
4. Gray or Brown Smoke:
- Could be a sign of worn engine components, such as piston rings or valve seals. As the engine ages and wears out, the oil seeps into the combustion chambers and burns.
If you notice excessive smoke coming from your exhaust when you press the accelerator, it's essential to have your vehicle inspected by a professional mechanic.