What Causes a Strong Gasoline Smell in the Car?
2 Answers
Here are the reasons for a strong gasoline smell in the car: 1. Under conditions of very low external temperatures, when the water temperature and exhaust pipe temperature are low, combined with the cold start of the engine during winter driving, the mixture tends to be richer. As a result, some of the mixture cannot fully combust and is directly expelled through the exhaust pipe, leading to a noticeable gasoline smell. This is a normal phenomenon. 2. It may be due to issues with the carbon canister or the carbon canister solenoid valve, causing an overly rich mixture during startup. 3. If the local temperature is low and there is excessive carbon buildup inside the engine, the mixture may not atomize properly, also leading to this phenomenon. 4. If the solenoid valve remains closed, gasoline vapor in the carbon canister will accumulate and eventually fill the entire canister. The excess vapor will then escape into the atmosphere, resulting in a gasoline smell. 5. A leaking fuel injector can cause an overly rich mixture, and the unburned mixture will be expelled through the exhaust pipe, leading to a strong gasoline smell.
I've been driving for many years and have encountered the issue of strong gasoline smell in the car several times, most commonly occurring after refueling or during cold starts in winter. Usually, it's caused by the fuel cap not being tightened properly, allowing gasoline vapors to escape. I would first stop the car and try tightening the cap. If the smell persists, it might be due to aging fuel tank seals or loose fuel line connections causing leaks. I once discovered a cracked fuel pump connector in my Honda that caused this issue. Don't take it lightly because fuel leaks are flammable and explosive, especially when the engine is hot. I recommend immediately turning off the engine upon noticing the smell, checking for oil stains on the ground, and then heading to a repair shop for inspection as soon as possible. Long-term neglect may also affect engine performance and cause air pollution. Developing a habit of regularly checking the fuel tank area can save you a lot of trouble.
