Ok ! SO may be Bill, can help me/us out on this one? Or any body else?
I cleaned everything up fresh gas and all and ran the 87 performance tune . Got about 12.5 mpg's in city a nit of a flat spot before and after and not as great throttle .
With the 87 tow I got 13.5 mpg's and a little better all around. Ran a bit hotter but "snappier" .
Could it be a problem with the program? And yes I set it back to stock each time first.