The smell of gasoline in the car is very strong. What happened?

The reasons for the strong smell of gasoline in the car are as follows:

1, fuel tank cover: the fuel tank cover is not well sealed and needs to be replaced or coated with 1mm thick butter under the leather.

2. Oil supply pipeline: The oil supply pipeline is slightly cracked or damaged.

3. Joint: There is a gap between the oil pipe and the oil tank (the clamp is not tight).

4. Pipeline: The carbon canister is filled with gasoline (absorbed). In addition, check the intake filter pipe in the hood, the pipe into the carburetor (similar to the EFI car) and those rubber pipes, which are easy to break after a long time.