Well i'm real close, the boost function of the guage appears to be functioning, but with the car on but not running the guage was reading -4. I'm too tired to trouble shoot tonight, but simply adjusting the intecept from -13.2 to -9.2 zeroed the guage (i know this is not the right thing to do). Now at idle it is showing around -7, and under hard acceleration it gets up close to 5. it is definitely transitioning to boost as the guage reaches 0. I will check all my voltages and ground in the morning.
2012 GT CS Ingot Silver Vert, Edelbrock E-force supercharger with CAI and 3.5 Pulley, Tremec T-56 Mag, Accufab 84.5, Centerforce DF, Billet Yoke aluminum driveshaft, FRPP 3.73 Rear, MRT Performance H-pipe, Bassani axle backs, JL Audio sound, Edelbrock strut tower brace, JPC adjustable UCA, UMI adjustable panhard bar, KW V3 coilovers, Steeda heavy duty front mounts, Steeda rear LCA's, 20" Steeda Spyders with Michelin Pilot Super Sports, Steeda Big Brake Kit ....... it just keeps going.