I just baught the car and am new to the Subaru scene. I recently sold my Cobalt Super slow for it. Well first off when hitting the gas at 3 to 4000RPMs regardless of gear the boost guage will shoot up to 20 then drop to twelve and continue to do this. Its not a boost guage problem because you can hear and feel the car loose it umph.
The car came with a COBB accessport and i am updating the software as i am typing this. It has the stage 2 Cobb tune on it but it is old so i will update the tune on it as well and see if that works.
I have checked every single vaccumm line hoping that this was the culprit, but saddly nothing was found. As far as i know it has a 3inch turbo back exhaust stock intake stage 2 clutch and some suspension upgrades. But this is the first turboed car i have owned so im new dont criticize haha. But any suggestion you can give me will greately help.