hi aron, on reading your first post,you said the car went into limp mode? and not rev above 3000rpm. may i suggest that you try this.... connect everything back up, and if possible start car! now if you hear a buzzing sound see if its coming from the top of the turbo. as you did state that there was a buzzing before. now what you need to do is look and see if you have an eletronic turbo actuator. this is an arm that comes from the turbo to the actuator and moves as you rev, look to see if the arm moves from the actuator. if not this may be you problem, hope this helps.