I have never been able to show fuel levels or exhaust temp. I have a 2010 Cummins and have just updated the firmware to 4.1, my coach fuel gauge has a digital readout in the menus, so the info must be available somehow. Same thing for exhaust temp?? Never been able to get Bluefire to display it on screen. I did find exhaust temp in a digital format somewhere on a Bluefire page?? But never displayed on my dash? Everything seems to be working better with 4.1 and I am not disconnecting anymore. Would be nice if I could figure out fuel and exhaust temp stuff though. Any settings I might be missing??