MPG have been down??

[Bobbys Big Red Rig]

Originally Posted by countryraised

so, I've had my FU chip a couple months now, put a few thousand miles on it, and my mpg's are about 13.3 running mostly the 65hp DD tune, with rare times on the 120race. stock I would consistently get 15.5mpg.
what tunes should I try for better mileage? other reasons it want down?
One thing, right before the chip, like 1 week, I removed the cat. conv. was pretty sooted. that's the only change.

I have the Phoenix. My MPG wend from 15.5 to 14. Used the 80DD most of the time. I got a little better out of the 120race being careful not to play. By a little better I mean about .5 MPG. My cat. was taken off before I got the truck. I have stock down pipe and 4" exhaust with flow thru muffler. Also have 6637 cold air intake. All this done before chip was added. I have just come to terms with the fact that I may never see 15.5 or more MPG again. The performance out weighs the loss in my mind. Sure I would like to improve MPG, one reason I checked out this post. But if I don't then I don't. Will be checking your replies just in case there is something else to try. Keep us posted and I will do the same.