....
Yep, all the turbo hoses (SAMCO and Neuspeed Charge and Discharge) etc etc have been thoroughly checked. also MAF, PCV, DV etc.
We'll be checking the turbo on Friday.
Some of these faults are tricky to find, especially if people don't agree (not the case with me).
Why not do a diagnostic dyno plot or/and go out with a laptop and check all the gobblygook stuff (with someone who knows what they are doing!).
Anyone reliable in your neck of the woods?