What Causes a Strong Gasoline Smell in a Car?
2 Answers
Reasons for a strong gasoline smell in a car: 1. Poor sealing of the fuel tank cap, which requires replacement or applying a 1mm thick layer of grease under the rubber gasket; 2. Residual gasoline during fuel pump installation or removal. The fuel pump must be installed or removed inside the car, and some residual gasoline is inevitable during this process. If not cleaned thoroughly, you may smell gasoline while driving; 3. If the gasoline smell is inside the car cabin, it is likely due to loose or cracked connections on the fuel tank's fuel supply or return lines, or at the interface between the fuel pump and fuel lines. These connections are located under the rear seat. Leakage here can cause a gasoline smell in the cabin, so immediate inspection and repair are necessary to avoid serious consequences.
I've been driving for over a decade, and the most likely cause of strong gasoline smell is fuel leakage. For instance, if the fuel tank cap isn't tightened properly or has become loose due to aging, you'll notice a pungent odor after parking. Another possibility is a ruptured fuel line – the oil pipes in the engine compartment are prone to seepage when aged. Poor sealing of fuel injectors can also allow gasoline vapors to escape. This is more common during cold starts because the fuel system relies on evaporation, and unprocessed vapors may disperse. Never ignore such signs once detected. Fuel leaks pose significant safety hazards and can easily lead to fires. Immediately visit a professional auto repair shop for inspection. During routine maintenance, always pay attention to the condition of fuel lines – don't wait for an accident to happen.
