Got her back wednesday
Final verdict that it was the terrible exhaust leak from the manifold gasket that was the major cause. Had this all fixed up with a new dump and front pipe inserted aswell.
Also had, full tune, FMIC, BOV, manual boost controller, repaired turbo water hose, heat wrapped, flush n bleed of coolant system also done..
After the tune she puts out 222.6rwkw (on 14psi) which I very happy with as I was only hoping to break 200.. runs very smooth now and has a lot more aggression