Need Help logging lc-1 w/ hpt standard

[Flash13Brandon]

Alright. I have a 2007 Cobalt SS/SC. I have read the how to on here about using the AC pressure switch to log w/ hpt standard. I have everything hooked up correctly it appears. When logging, it is only telling me ac pressure volts. For example, it is reading like 2.xx volts when cruising and 1.xx when it enters PE mode and leans out. Is there a way to convert volts to an AFR or is the equation wrong. Thanks for any advice. Can't seem to get any help over on the Cobalt forums.

[416 Rigby]

Best to try over on the HPT forum