so I was thinking mud monster was on its last legs, has been some very strange noises last few weeks got really bad and had bugger all power, after long investigation I noticed soot on one of the coolant hose just above the water pump (diesel guys will know which one) pulled the intake pipe off and the heat shield noticed soot every where, looked at where the turbo bolts to the manifold and was covered in soot, turns out all the bumpy roads ive been driving on had rattled the turbo bolts loose, bolted it back up and problem fix
no need to refit the boost controller, 15psi just don't cut it for me its too sluggish back to 25psi
cant over take cars on stock boost