boost leak?

i have a '91 eagle talon Tsi AWD. so foar i have a big 16g turbo,255 walbro pump, greddy exhaust, apexi' AFC, 2gen manifold, tmo stage 3 chip, and the classic hall man boost controller..... but i have a problem. every time i hit the gas and try to turn up boost i get a big boost leak.
even if i have my boost controller set for the highest boost level i only get about 8 psi insted of full boost. what can possibly be leaking?????????????

Adnan

get a silicone coupling, a PVC endcap from home depot and a valve stem and make a leak tester. Thats the only way you'll REALLY be able to tell.
Or you could just check all the couplings and connections

do you have an aftermarket boost gauge? if your going by your stock gauge it wont read the correct boost pressur with those mods

a simple kpa/psi guage will tell you your exact boost levels. dont go buy one from some expensive magazine...