Why is there a strong gasoline smell outside the car when starting it?

[DelHazel]

The reasons for a strong gasoline smell outside the car after starting it are as follows: 1. Fuel tank leakage: Sometimes when starting the car in winter, a very strong gasoline smell may occur, which could be due to a leak in the car's fuel tank or fuel line. 2. Piston carbon deposits: Excessive carbon deposits on the pistons caused by cylinder combustion. In fact, the cylinder has a certain adsorption effect on gasoline, but too much carbon deposits will cause a lot of gasoline to adhere to the valves and pistons, leading to insufficient high pressure in the car, which increases fuel consumption and also produces a stronger gasoline smell. 3. Incomplete gasoline combustion: Incomplete gasoline combustion can also produce carbon deposits, which will adhere to the valves. Under high pressure, incomplete combustion will lead to increased vehicle fuel consumption, and at this time, a strong gasoline smell can also be detected in the car.