Any Vw/Audi experts on here, got a 1.9tdi with boost problems

[Jamie.T]

Hi guys, wondering if anyone can help me.

Got a 2004 plate VW Touran 1.9tdi 105 with intermittent boost problems.

I know that they have a common fault of sticking veins in the turbo, but the actuator and operating arm is all moving freely and showing no signs of stiffness.

Fault codes came up with boost pressure sensor and intake air temp sensor which is the same unit. Ive replaced this unit and the turbo is now boosting a lot more often than it was, but 50% of the time ill start up and drive away and no turbo boost at all.

Ive also unplugged the MAF which made no change at all, could this be a sign of a fault?

Any help would be appreciated.