Ive just put an AVO stage 2 cooler on my car and had a T04 compressor wheel put in the turbo. Before all this my boost was set at 12psi. Now that the new stuff is on its only running 9psi. Everything is tight all hoses and everything, is it possible to lose that much boost in the cooler? There is no leaks or is it something do do with using a T3 exhaust wheel and a T4 compressor wheel together? any help wood be great.