thanks folks, i'm gonna check to see if it has a chip fitted to it first.

one of the bolts on the turbo is missing. They are the bolts from exhaust elbow to turbo housing. Its already snapped in there so i need to get it drilled out.
I had a blowing sound coming from the front pip i thought it was the exhaust itself, now i know its the bolts thats snapped and needs drilling an retapping as half of it is still screwed into the exhaust housing.

do u think this could help cause the hesitation and flat spot as some exhaust gases are escaping from this gap and some are coming out the exhaust?

cheers again