boost problem

[onesicsupra]

hey i needed to know if anyone can help me. i have a 94 supra tt with a 98 jspec motor in it. my car was boosting fine until i replaced my water pump. as soon as i started it up for the first time i had no boost. ive checked my intercooler piping and no leaks, same with my b.o.v. i took my piping apart at the intake manifold reved the engine and its getting plenty of boost. im thinking of a vacume leak. there is an open nipple that is sucking pretty hard on the back of the intake manifold but i cant find a hose. ive also checked my wastegates and neither ar stuck. my care was not running for about 3 months due to complications on finding the jspec pump. please let me know if you can help onesicsupra@yahoo.com thanks