I have XFI. My FAST MAP sensor is a 3 bar FAST sensor and the calibration values are in accordance with the XFI manual. Without the engine running the MAP sensor reads 94 kPa and Raw MAP(V) is 1.51. The barometric pressure at the time of this reading was 30.22 In Hg which is 102.3 kPa. I have a new 3 bar FAST sensor (spare) that I plugged in and got the same readings. I have 5 vdc and a good ground going to the MAP sensor. The calibration is linear - 0.00 @ 0 kPa to 5.00v @ 315 kPa. Questions: What causing the difference between what the MAP sensor is saying vs the actual? Is there a different calibration than the one in the manual which is what I have set up? Could there something wrong with the ECU that would be causing this?