Have an 04 wrx with cold air intake, front mount, and BOV. Have a Cobb accessport car currently has a stage 1 93 tune. Car runs fine, but when floored it falls on its face. It just has no power at all. I already have reset the ecu with the AP, changed the maf sensor. Sounds like there is a exhaust manifold leak though, before the turbo. Maybe a blown uppipe gasket. Has anyone else had this issue.