Why does the car smell like gasoline after refueling?

[LincolnRose]

It may be due to a blocked gasoline vent hole. Next to the fuel filler hole, there is a vent hole for gasoline vapors. Its function is to maintain the pressure in the fuel tank higher than atmospheric pressure when the temperature rises, causing gasoline to evaporate into vapors, thus preventing the engine from stalling. When this vent hole is blocked, the evaporated vapors cannot be released and may escape elsewhere, leading to a gasoline smell inside the car. More details are as follows: 1. Therefore, when there is a gasoline smell in the car, you can use compressed air to blow into the vent hole. If the vent hole is clear, you should hear the sound of air flowing out from the fuel filler hole. 2. Sometimes, the gasoline smell inside the car is caused by a cracked fuel line, improperly closed fuel tank cap, leaking fuel injector, incomplete engine combustion, etc. Other possible situations for a gasoline smell inside the car include: 1. Poor sealing of the fuel tank cap, which may require replacement or applying a 1mm thick layer of grease under the rubber gasket; 2. Fine cracks or damage in the fuel supply line; 3. Gaps at the connection between the fuel line and the fuel tank (clamp not tightened properly).