[shaggymx3]

I am having a boost problem. The car is bogging down while under 3psi. This is my First Turbo supra and im not understanding why it does this.. i do have a major exhaust leak by the second cat, and i might have one on the down pipe. Will this effect boost? when ever it spools it bogs down, my knock sensor code is up and also turbo pressure sigal?? what do i do to fix this problem