The consumption is puzzling. If there is no smoke, then it appears that the engine is burning clean. If it were consuming significantly more fuel at reduced power, it should be partially burning the excess fuel, and producing smoke.

In this diagnostic suggestion, I had eliminated one of the factors: the increased consumption as it conflicted with the other symptoms, hoping that it is either a measurement error or unrelated as a dragging brake, alignment change, etc. If it has occurred over a long period of time it might not be engine related and frankly 32mpg if you're driving 70mph-75mph seems quite good.

If I put that symptom back in, to make sense I would need to remove another symptom like the good boost at low-mid RPM to pull any other diagnostic opinion from my bag, then I'd throw in things like restricted exhaust, an exhaust leak pre-turbo, intake air leak, sticking AFM, bad turbo, bad timing, most of these needing more smoke or reduced boost.

Eliminate the things that are working properly: ALDA, turbo and wastegate, cylinders & heads, valves. Really only leaves the intake, exhaust (restrictions), IP governor, and fuel delivery IMO.

What is your max. RPM under load? Un-loaded? Does it have problems reaching the full-throttle shift points?

__________________

Gone to the dark side

- Jeff