Little history first, I run std hptuners, always use latest software version (not beta). I use an aem 30-300 and have it wired through the a/c, worked great last fall, hptuners matched the gauge.
Fast forward to this spring, only change is I believe I updated the software version (not beta), and now the two do not match, hptuners shows lean, I did not make any changes either to the gauge or to my hptuners on my tablet.
The parameters in hptuners is "(2.3750*[7101.10])+7.3125", I got this info from the gauge instructions.
Any ideas?