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I seem to have gotten it to work okay with a combination of a certain tune and a certain MAP sensor. It's only reading like 2 psi boost max and 12 psi vacuum. It should be reading 100 w/ key-on, but it's reading 84. That's the closest any of the 4 2 bar MAPs I've tried. (NAPA L32 162 kPa, AMZ L32 185 kPa, other L67 168 kPa). Offset for GT is 10.33 and GTP is 7.99. Someone on the DHP/HPT fakesbook martinsplace group got pretty snappy with me trying to convince me it's a wiring issue. I have 5V input and ground. The reference signal is controlled by the MAP. I'm confident that it's an issue with all of my sensors. The NAPA one brand new $70 unit won't change readings with vacuum applied. That dude is still in my head, though. I don't want to change the scaling and offset this sensor being off, but it looks like that's what I'm going to need to do. I talked briefly with the guy that tuned my Forester and those were his initial thoughts, too, that the scaling was off. I'm going to flash it to the same tune it's running now but with an offset of 10.33 instead of 7.99.