Boost Creep (I did my research first)

[HiImBrian]

First I want to say, I did do quite a bit of research about this before I decided to post this thread. So I realized yesterday that my gsx is experiencing boost creep. I know this because my boost guage hits about 11 psi then pauses and climbes fast to 16ish. So after about 5 mins of this I came to the conclusion that I had boost creep. I know that boost creep is caused by a few things: restrictive exhaust that would cause backpressure, and I've heard some stuff about the wastegate, I've also heard about the manual boost controller causing it.

My manual boost controller seems kind of sketchy (came with the car) but it was working fine before? I know it can't be my exhaust-I have a custom straight 3'' exhaust w/ almost no restriction at all. And as far as the wastegate-I'm not really sure.

I'm hoping that a new manual boost controller will fix this problem. Any other suggestions???