I am a new GXP owner. Have some questions about the turbo. When I accelerate in 2nd, 3rd or 4th I get a quick boost to 12 PSI or so and then it goes away instantly, back to 0. When the boost cuts off, the engine/turbo/transmission, I'm not sure what, makes a weird sound, like the horn honking on a 1925 model T. Is this normal? Am I doing something wrong?