How to Deal with Gasoline Smell in Exhaust During Cold Start?

[LeviRose]

This is a normal phenomenon, as all vehicles emit a gasoline smell during cold starts. The gasoline odor is related to the control method of the injection system, which operates in two modes: 1. Open-loop control and closed-loop control. During open-loop control, the system does not reference data from the oxygen sensor. For a period after the vehicle starts, the engine injection system operates under open-loop control. The high concentration of the air-fuel mixture results in unburned gasoline being expelled with the exhaust, which is why there is a gasoline smell in the exhaust. 2. After increasing the fuel injection, some gasoline cannot be completely burned and is expelled through the exhaust system. Therefore, there is no need to worry about the gasoline smell from the exhaust pipe during a cold start. The odor will disappear as the engine temperature rises.