What are the reasons for a strong gasoline smell inside the car?
2 Answers
Reasons for a strong gasoline smell inside the car: 1. The fuel tank cap is not sealed properly, requiring replacement or applying a 1mm-thick layer of grease under the rubber gasket; 2. The removal and installation of the fuel pump must be done inside the car, and during this process, some residue may inevitably remain. If not cleaned thoroughly, you may also smell gasoline while driving. Next to the fuel filler hole, there is a vent hole for gasoline vapors. Its function is to release gasoline vapors when the car's fuel tank heats up. When this vent hole is blocked, the evaporated vapors cannot be released and may escape elsewhere, leading to a gasoline smell in the cabin.
The smell of gasoline in the car may be related to several key components. First, fuel line leakage—long-term vehicle vibrations can cause rubber hoses to age, crack, or loosen at connections, allowing gasoline to seep out and evaporate into the engine bay, which is then drawn into the cabin by the AC system, causing odors. Second, a poorly sealed fuel tank cap—if not tightened properly or if the gasket is damaged—can allow gasoline vapors to escape, especially noticeable after refueling. Third, a clogged or faulty charcoal canister, which is responsible for absorbing fuel vapors, may fail to control odors if damaged. Fourth, failed seals on the fuel pump or fuel injectors can cause small amounts of gasoline to drip. During inspection, first check for oil stains under the car and sniff around the engine area to identify the source. Serious issues may require part replacements, and regular maintenance is recommended to prevent worsening, as this significantly impacts driving safety.
