the restrictor is really hard to feel. It may be there.
other then that, maybe you have a boost leak?
Maybe your boost solenoid isnt working or isntl plugged in?
Put all 1's in your boost map, if your boost solenoid clicks like a mad-man, then your boost control solenoid is getting power. (still doesnt mean its working right though)
p.s. I have yet to see a STI that needed the ABC.