FICM reprogramming will it help my truck.?

[fishmanwill]

Hello everyone I am new here and looking at getting some work done on my F-350.

I was researching and reading up on tuning the FICM and turning back the ECM and was wondering if it would be good for my truck. I have a 2004 F-350 crew cab, 4x4, 6.0L, automatic, and 3.73LS rear end. I drive my truck on a daily basis about 50 miles to and from work and would like to get the best mpg that I can get. Right now I can get 14 to 15 mpg. The 50 mile trip each day is about 30% city and the rest country highway at 60mph. I keep the truck under 2000 rpm when driving and I am easy on the pedal when starting and easy on the brake when stopping. Also on my truck I have a straight exhuast, sythnethic oil, and I maintain it regularly and I also have 295 tires which are a little bigger then stock. Will tuning the FICM and rolling back the ECM be beneficial to my truck? I would like to really improve the mpg that I currently get. I am not sure what tune is on my truck right now, but it was at the dealership about 2 years ago and was retuned and right now it has the injector buzz after I turn the truck off for about 30 seconds. What other information would you need to determine the benefits to my truck? I have read that tuning the FICM is capable of doing it remotely by you guys sending a programmer, but how does the ECM work, is it remote also or do I have to send that in? Thank you for the help.

William