I have a evolution and when I program to any setting I lose power and start getting terrible gas mileage, go from 15 mpg to 11mpg I have updated the box and still to no avail. Anyone else have this issue? I have tried all three programs and just not impressed with the drive ability o the unit. When in stock mode it shifts nicer, has more towing power, and better gas mileage. I just can't figure out why cause everything I read it's supposed to be the opposite