that throttle position is very important as if it is off it will throw off the entire tune. if you have the money I would recommend a dyno tune from a qualified shop. We have one on south Austin if you are game for a trip. I was getting 40 to 43 after the dyno tune but stock was getting 48 to 50 but ran hot and like crap

 

NOPE!
got a 07 train with RSD pipes and PC IIIusb and went from
50mph to 45mph highway
44mph to 40mph local