Just curious if same thing happened
I have the H&S XRT Pro on my truck and love it. A couple weeks ago I downloaded the new software which was 6.4.4 I believe and installed on the truck. It seems now my mileage has gone down a good mile and a half hand calculated it was at 14.2 city consistant and now 12.8, but my dash computer miles per gallon is within 3 tenths unlike before being 8 to 10 miles off. Also, as soon as I installed the new program the exterior temperature sensor is now off by 10 degrees. No big deal to me, but thought that was wierd. Just curious if anyone else had the same problem or it was just me?