What causes a strong gasoline smell when starting a car?

[LeRuth]

The reasons for a strong gasoline smell when starting a car include issues with the solenoid valve, excessive carbon buildup, and fuel injector leakage. Solenoid valve issues: Problems with the carbon canister or carbon canister solenoid valve can cause an overly rich air-fuel mixture. Excessive carbon buildup: Too much carbon buildup inside the engine can lead to poor atomization of the air-fuel mixture. Fuel injector leakage: Gasoline is a volatile, flammable hydrocarbon mixture liquid derived from petroleum through distillation or cracking processes, used as fuel. Gasoline has a high octane rating (anti-knock combustion performance) and is graded by octane levels into various types such as 89, 90, 92, 93, 95, 97, and 98.