1999 Dodge Caravan Excessive fuel smell when cold.

When warming up in winter the smell of gas is very, very strong. The interior is also too strong to even get in. Smell leaves in 15 to 20 minutes after it warms up. Even driving 5 miles or so when you get out you still can smell gas normally around passenger door. Had it checked out and there or no leaks. Helllp! Thanks