What causes a strong gasoline smell when the car just starts?

1 Answers
VonPenelope
07/29/25 5:36pm
A strong gasoline smell when the car just starts is due to: 1. If it disappears after the car warms up, it's because the combustion efficiency is poor during initial startup; 2. During cold starts, the water temperature and exhaust pipe temperature are low, resulting in a richer air-fuel mixture. Some of this mixture may not burn completely and is expelled through the exhaust pipe, causing the noticeable gasoline odor. If the gasoline smell persists after the car has warmed up, there might be an issue with the vehicle, and it's recommended to have it inspected at a 4S shop or professional auto repair shop. This gasoline smell during startup is more common in winter. The engine's normal operating temperature is between 80 to 90 degrees Celsius. When the engine reaches this temperature, the ECU will correspondingly reduce fuel injection. At normal operating temperature, fuel burns completely, and the gasoline smell will disappear.
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