Also Im assuming when you say all the supporting mods you mean just a turboback exhaust and maybe a catless uppipe right. Because if you don't follow their mod list exactly the tune will be wrong. But yeah as stated above it could be the same issue. Especially since the car did sit for a bit. Let us know bc this issue seems to be showing up pretty often. Even with my car...which is due to plugs that i havent had time to change. But i have been kinda babying my car around for the most part.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.