Possible boost leak....please help

ok ive been having major problems with boost leaks with my gst...but i finally fixed them all! problem is i still cannot hold pressure, why is this. i tested over and over again and found no leaks all the way up to the tb, what could be causing this??

have you checked the injector seals?

Or the throttle plate shaft seals. Or intake manifold gasket.

What are you using to test? Soapy water sprayed on the problem areas? Listening for air escaping doesn't always reveal all of the leaks.

Pressurize the system, drop a few drops of soapy water on your injector o-rings and see if they bubble. Otherwise, the shaft seals are probably your culprit.

If I can't find a leak I take it 1 pipe at a time. First test from your throttle body, then your uicp, etc...that will find the culprit