Boost control problem.. dont know where to start.. (Diagram Attached)

[RedTurboEclipse]

Hey guys, I've tried to solve this by myself as I figured it was all just a matter of vac lines. but no luck.. First of all my setup..

95 GSX
pte 50, internal gate
660s
3" turboback
profec b (old one)
etc, etc etc

now the problem.. i cant turn up the boost.. pretty common problem.. ive searched and it seems like my vac lines are connected properly.. i only get 15-16 psi.. on low and high boost.. attached is a diagram of how i have everything connected (please excuse how wack it is)

i also removed the line from the wastegate making sure it wasnt something with the turbo.. doing this definitely let the boost go up to as high as it wanted..

any ideas or suggestions? the only thing that is coming to midn right now is faulty profec?

 

[1stGenRocks]

you could try hooking the line from the profec to the compressor outlet instead of the TB/FPR line. not sure if it would help but i know some people have had trouble with slow/bad readings on the TB fittings

 

[jonk00000]

when i put a mbc on my car, i also had the exact problem. it ended up being that i put the boost controller in wrong i switched the two lines. i put the one i had from the wastegate actuator* where i had the one from a vacume line , and the vacume line to where i had the wastegate line. pretty simple but it just might be the problem, hope it helps