Car not making target boost after tune.

[Legacylad]

So my car is an 07 GT-B auto, only mod is a TD05-16g.
I recently had Matt (KiDo) tune my car and while we were giving it a run and doing some logging we noticed that it was only making around 13 psi boost in both sport and sport# modes. Apart from that the car is running great. Very stable and consistent boost, no spiking, making really good power.
Target boost in sport# is from memory around 16-17 psi with Matts tune, but it won't reach that boost so we figured it must have a boost leak or maybe the boost pressure was causing the wastegate to open prematurely as there was no restrictor pill in the vac lines.
So starting with the easiest, I put in a restrictor pill with an aperture of 0.9mm between the compressor housing and the T-piece to see what would happen. Now I am getting around 14.5 psi peak boost in both sports and sports#, but still not 17 psi.
The question is should I go a smaller aperture restrictor pill or keep checking for boost leaks or is the stock boost solenoid not up to it and should I think about a 3 port boost solenoid?
Any suggestions or ideas would be welcome.

[kiahatsiu]

Leave the restriction pills alone, well, as they were when Matt had the car. Go looking for a boost leak. Also, if you have the ability to do so, run a learning view to make sure it is all okay.

[Legacylad]

Leave the restriction pills alone, well, as they were when Matt had the car. Go looking for a boost leak. Also, if you have the ability to do so, run a learning view to make sure it is all okay.

There wasn't any restrictor pills when Matt was in the car. He suggested to put one in, and when I did I got an extra 1.5psi in boost. Wouldn't that point to it being a wastegate issue rather than a boost leak?

[brainy]

When you purchased the turbo, what actuator size did you request?

[Legacylad]

Turbo was already on the car car when I purchased it and previous owner wasn't very helpful with that sort of information, so I'm unsure about the actuator.

[peadya100]

Have you checked the blow off valve?... Theyre known to leak boost sometimes... Pretty cheap to replace too.