Cupra TDI - boost stops rising below 3k RPM

[killbot]

I've just had a new hybrid turbo fitted and had the car mapped and having some issues with boost levels not increasing correctly when flooring it from certain RPM.

If I floor it from below 2k RPM then the car boosts perfectly and as expected reaching peak boost around 2.3k RPM at 28psi. However if I floor it above that the boost rises and then stops at around 21psi until 3K RPM where afterwards it will increase to what it should and I get a big dump of power.

It isn't a turbo issue as its a brand new unit. I was just wondering if anyone knows if this is a mechanical issue somewhere else. Seems as though something is holding the boost back.

I also don't believe this is a mapping issue either as I experienced the same issue on a stock map.

 

[R3k1355]

Have you had it on VCDS, you might have to run around and read live data to figure out where the problem lies.

 

[killbot]

Yeah had it on VCDS, no errors.

Been taking group 11 logs on VCDS and you can see the vanes change position and boost stop rising even though it's requesting the right amount. Something seems to be causing the vanes to open preventing boost from increasing.

Just can't understand what