no difference in mpg after rollback.....?

[fishmanwill]

I had the FICM and ECM rolled back a couple of weeks ago. I am very pleased with how the truck runs now and glad that the post shut-down injector buzz is gone. The truck runs good and it seems to be smoother.
I have put about 1,000 miles on the truck since then and only have one thing I dont like and that is that my MPG did not increase at all. Everything is maintained on the truck and up to date. The tires are properly inflated. I have recently cleaned the EGR valve, I searched on here and found the EBP sensor can cause problems, I cleaned the sensor and the tube. I drive the truck under 2,000 rpms. I dont know what else to do. Is there someting else I can check or do to increase the MPG, I am still only getting 12-13 MPG. Thank you for the help and hopefully I can get a few more MPG's out of this truck.

William