PLX, V2 Voltage Offset - HELP!

[JezzaB]

Hey guys,
Im tearing my hair out. I have posted that awhile ago my V2 suddenly went out of calibration. I recalibrated it and thought that it was ok but its not. Ive tried outputing the voltages with

-Batteries
-Variable power supply
-The PLX (2.34 unplugged and 5v plugged in free air)

They all work bang on for the 2 reference voltages but it reads around 100mv out everywhere else. It reads lean and it just makes it richer and richer when doing an autove. Embarrasing when you tune a car and its using more fuel.

I tuned a car before the calibration dramas and its LTFT's were great.

One example is I held a load point and constant voltage (within 50mv) 1650mv in efilive and when I pull it off the V2 and put the multimeter on it, it reads around 1520mv, then put the V2 back on and its 1650mv.

I just dont know what else to do.

Jez