Yeah from the intake to the back of the controller! Yeah having a brief read through that manual it seems it's all to do with the gains and boost cut in! Have you cable ties all connection? Intake/connectors ect??
in the manual ive put up in the trouble shoot section its says boost will not increase = not getting intake manifold pressure/ Check the pressure hose connection to the intake hope that gets you sorted
http://www.greddy.com/upload/file/PRofec_Bspec2.pdf shows you how your vacuum should be rigged up! ill have a look through for external/internal settings
Yea you can only increase with a ebc not decrease past the spring. also all ebc should have 2 setting one for external and one for internal wastegate make sure thats been set up correct.