D16Y8 Turbo problems

I just finished installing a custom bolt-on turbo system for my GF's Civic and I'm having some problems.

Specs are:
98' EK Civic coupe
D16y8 sohc vtec - stock
GT25 Turbo - internal wastegate
Custom manifold
Intercooler
450cc injectors
Full aftermarket EMS
AVC-R boost controller

I got the car dyno'ed and boost is only hitting 4psi. I've checked the wastgate and it's closing fully, boost controller is working fine (tested without the boost controller as well, same problem).
I've checked all my pipes, hoses, turbo, intercooler and everything is as tight as tight can be.

There is also a clicking sound at around 3500rpm... sounds like a solinoid or similar.

And one more, do you guys keep the vtec when boosting or you cut it?

Other then that, the car is producing 105kw to the wheels with 4psi which I'm more then happy with, but I know the turbo spools to 10psi standard.

Any suggestions?