What Causes a Diesel Vehicle to Emit Black Smoke and Lose Power?

1 Answers
DelAlana
07/30/25 4:49am
Diesel vehicle emitting black smoke and losing power is caused by: 1. Rapid acceleration while driving (usually above 2000 RPM); 2. Cold engine start; 3. Idling (especially noticeable above 2500 RPM); 4. High-altitude effects (commonly seen above 4000 meters altitude). The black smoke emitted by diesel vehicles mainly consists of carbon black particles, which are classified as particulate emissions. Under normal vehicle conditions, this primarily occurs during rapid acceleration and high-idle RPM situations. Solutions for diesel vehicles emitting black smoke: 1. Replace the air filter; 2. Replace the solenoid valve (including the turbocharger's solenoid valve); 3. Replace the fuel filter; 4. Clean the fuel system; 5. Replace damaged components; 6. Add diesel fuel additives.
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