Hey guys, I have a problem with my turbo i think. My turbo is not kicking in until a lil after 4 grand, and it barely kicks in. when i press the gas, the turbo gauge kicks up to 0 but from there on it ?Slowly boosts up and does not pass 7 to 8 psi. One guy told me that i might have a vacuum leak or something like that. my car has the cobb stage 2 tuned map on it...i do have the exhaust for it too. Should i reflash the map?