Power loss
Pulling a spark plug or two and analyzing insulator data can reveal a lot of issues internally as well, even without a scan tool. These cars are complex, and power loss can happen for many many reasons.
These cars are complicated. Lots of things can cause power loss but 330hp is really really low and something is wrong. If you have IR Thermometer, shine it on the turbos and see if there is a big difference, also check the heat exchangers and intercoolers. They should NOT be that much different temp wise from each other. If they are, something is wrong on the bank that is reading hotter (mebbe a LOT hotter) . Also check the turbo inlet pipes and see if the hoses are cracked or broken and leaking. It happens and will bleed off a LOT of power.
Hope it is an easy fix!
and the boost is almost zero at high rpm, about 1.7bar
but i see that the boost screen when i accelerate run good with no lag !





