Rabin,
I haven't done anything with the boost or turbo. Im thinking it's probably something to ignition, plug wires, distributor cap, because if I'm cruising along at a stead rate of speed engine pulls ok. I do how ever feel some slight hesitation, it' only occurs when I pull away from a dead stop (occasionally) or when I need to accelerate like getting in the freeway or passing, so therefore I have to ease into the accelerator.