I went through a hands free carwash with my Murano, the cap was off and the fuel door was open.

What is your question?

If you got too much water in the gasoline you just might have to get the tank dropped and the tank emptied. Also your entire fuel system will need to be cleared of this excess water. Be sure to not run the car any longer than necessary until you can have this vehicle professionally checked out for any damage. That's going to be one helacious car wash bill.