What Causes a Gasoline Car to Emit Black Smoke?

[DiSteven]

When a car emits black smoke, it is often due to uneven or excessive fuel supply from the high-pressure fuel pump across the cylinders. This can cause unstable engine speed and intermittent black smoke emissions. The issue should be addressed by adjusting the fuel supply to achieve balance or keep it within the specified range. Additionally, malfunctioning or damaged fuel injectors can lead to insufficient fuel atomization, resulting in black smoke. In such cases, the injectors need to be inspected and replaced. Below are the reasons and solutions for a car emitting black smoke: 1. Check if the air filter is clogged, if there is any leakage in the intake pipe (which may cause the engine to produce a sharp whistling sound under increased load), or if the turbocharger is damaged. 2. The solution involves inspecting whether the turbine wheel and compressor wheel blades are damaged and ensuring they rotate smoothly and flexibly.