So I never really questioned buying my car from a dealer that if it had aftermarket components on it it would be obvious or the dealer would let me know before I buy it. So today, I went and dug around a little in my engine bay looking for loose hoses or tighteners and what not, and I see a "TRUST" rubber housing, which made me think maybe this isn't even a factory VF39 turbo, and sure enough it has a Forced Performance turbocharger ( I have no idea what model), so that is probably why my car isn't running right? I am running the Cobb AP Stage 1 91oct map. Could this be why my car is hesitating when I try to get on the throttle a bit? I am an idiot!!!