I just purchased a 1995 with a manual transmission and 4 wheel drive. I got it home from the dealer and parked it in my garage. The next morning the garage smelled like gas (kinda sour smelling). There were no drips on the floor or moisture on the underside or frame rails. It is NOT hard starting or dielseling, NOT running poorly or consuming too much gas. The smell inside the cab is faint. The smell is worst after parking the vehicle overnight. Thoughts? I'd like to avoid the fuel injectors if possible and since it is starting and running fine this seems least likely. 92,700 miles, maintained, excellent mechanical and physical condition. Help!