High Boost Problems/Remedies?

[AWDTerror]

Ok so i installed a catback exhaust and how have a catless turbo back system and I have a greddy profec b installed and i'm boosting 16-17psi and hitting fuel cut and can't turn it down anymore. also to see if it was a problem with the boost controller, I hooked the pressure source off the compressor housing straight into the wastegate...same problem, anyone have a remedy? can the wastegate arm be adjusted or something else? or is this something that will go away with warmer temperatures

 

[Moms]

i too had a profec b spec II on my car with fuel cut all over the place.
i also couldn't do a thng about it.
after that i bought the hks evc. the boost didn't have the spike i had with the profec, but i then noticed that the fuel cut was so close to the high boost as is, that i just removed the evc and sold them.
i read some people install the fcd.
i think s/u has one for sale.

 

[AWDTerror]

i have a spec 1 the one with the 3nobs. i think its the free flowing exhaust causing the problem because of the small wastegate and turbo. my hypothesis is it will go away when it get's warmer.