Like I said its not overboosting, its doing the opposite. And there ain't no cat on a diesel joolz. There was a lad posting here a while ago who worked for a turbo reconditioners, I'll see if I can find him and draw his attention to the post.
that would be me then!
except its not a recon place....we build brand spanking new ones, for trucks but basicly the same as car ones,but we have a reman department
our vg system is far better than the garret one! but damn its patent protected :-)
anyway bear is confused but the "rod", all this does is move a arm what in return moves the vanes in the turbine end of the turbo to alter the exhaust flow, this gives more power to the car across the band, and does away with the wastegate as the vanes limit the flow of gas.
right........vg turbos are setup ours are set at what will be its closed limit so it can never shut more than it is.......ours pneumatic ones are not user adjustable as its set inside during assembly, our electonic ones are also set but the electric actuator can adjust itself when carbon builds up
now it is possible that the setup was slightly off..
but...on reading the thread i thought 2001 cars had a regular turbo? and there are quite a few different bhp versions around that time ?
if bear as driven a alfa with a regular turbo you cannot compare the drive of the 2 as thay are different
so if its the turbo..........and deffinatly the correct one then the set up of the vg mechanism could be of slightly.........the best thing to do is find someone with a rolling road tell them your story and see if they will at least stick it on to see whats going on, if its the actuator that needs adjusting they will be able to do it
one big thing id suggest it to do a ecu reset first.........with all them new parts on it id let it re learn all the base settings