What Causes Black Smoke from a Car's Exhaust?

[RichardLynn]

The reasons for black smoke from a car's exhaust are: 1. Vehicle overload or engine overloading; 2. Insufficient cylinder pressure, engine temperature too low; 3. Improper carburetor adjustment; 4. Clogged air filter element; 5. Individual cylinders not working and delayed ignition; 6. Incomplete closing of intake and exhaust valves, poor compression of combustible gas, worsening combustion, and increased smoke levels. The solutions for black smoke from a car's exhaust are: 1. Use high-quality fuel or fuel additives; 2. Regularly clean the fuel lines; 3. Keep the air filter clean and replace it periodically; 4. If the fuel filter is damaged, replace the solenoid valve promptly.