Why is there a gasoline smell after starting the car?

[HarleyFitz]

There are several main reasons for the gasoline smell after starting the car: 1. Fuel tank leakage: This cause of gasoline smell is relatively rare, as it generally doesn't occur unless the car has suffered significant collision damage. 2. Piston carbon buildup: Excessive carbon deposits can cause gasoline to adhere to the valves and pistons, leading to insufficient high pressure in the engine, which increases fuel consumption and produces a strong gasoline smell. 3. Incomplete gasoline combustion: Incomplete combustion of gasoline produces carbon deposits, and excessive carbon buildup will generate a gasoline smell.