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Hi Gang, Long time viewer/reader, First time poster. So I have a FG MK2 Xr6 that has been stripped down and made into a FGX everything except the body, I like the MK2 front and back over the FGX but everything else (Dash, ECU, Looms, ext) are all FGX [From a FGX G6E Turbo]. The car used to be NA and currently rocks a BF EGAS Motor with a turbo bolted on and crow valve springs. After I got my new tune with a bigger 3582 Turbo it made 380rwkw, But here comes the issue. It will only boost once and goes into a limp mode kind of thing where it will only go to 5PSI after the first boost (Guessing spring pressure as its setting [The ECU] waste gate duty to 100%) It throws NO Codes and will not show any idication as to why its doing this limp mode thing, Turn the car off and back on again and it will go back to normal, makes boost fine for a single pull then as soon as I throttle off it goes into limp mode, Again, no codes and no dash lights but it just stops boosting, Running monitoring software is showing wastegate duty at 100% after one pull... I and my tuner are stumped Heres the even weirder thing, If I disconnect the Boost charge sensor located on the pre throttle body elbow the car runs fine, Yeah it trows a code for the sensor not being there but it boost without issue, just have a code and Eng light on if I do this. We have replaced the engine loom, The Sensor and the boost solenoid and its still doing it. any ideas? We can not figure this out at all, none of it makes sense, No one on Club FG or Barra pages on Facebook have any ideas either, It seems like some sort of gremlins in there messing with me. Stumped guys, For now I just deal with Christmas tree dash and codes being throw so I can have fun... But I really need to get this fixed as its playing with the tune with that sensor out. any advice would be appreciated!