get 4.92v@ analog out, 4.78v@Scanner used offset correction below, but the correction wasnt enough to bring AFR up to free air max
4.92-4.78 = .15
.15/.625 = .24
volts/.625 + 10.24 = 17.85 AFR
had to bring up correction to 10.36 before HPT would read free air AFR of 18....WTF ??