After being quoted approx 400.00 dollars at Ford, I decided to replace the UIM & LIM gaskets myself. It was also a good time to look at the valve cover gaskets & replace the spark plug wires & plugs. I did not breakdown the fuel rail, but instead, I left it attached to the LIM when I removed it. It saved on additional expense as well as time. I spent a full day, and I am happy to say that the car is running perfect. Codes P0174 & P0171 are no longer coming up. Thanks to all who provided input
