94 S4 Lose of Boost/Vacuum

[Dwayne Cosby <dccosby@interlog.com>]

Recently I have noticed that my 94 S4 hasn't had that same old neck
snapping torque it used to (chipped with IA - 280hp). So I decided to
install a boost gauge to see if it was real or all in my head. 

I 'teed the gauge into the manifold line that feeds into the ECU. I
started the car and figured I should read some level of vacuum at idle. I
read 0 PSI. I reved the engine, still the gauge reads 0 PSI. I went for a
little ride and still 0 PSI.

So I disconnect the fittings and blew into each leg of the T to confirm
the fittings are good, and the gauge works. Everything works. I then
checked to make sure the manifold to ECU line wasn't kinked.

Next I suspect that I've blown an intercooler hose. I check those and no
problems found. 

I'm stumped here. This is my first turbo charged car, so I am far from an
expert. The car runs fine (albeit with less power), you can hear the turbo
charger spool up fine, but the engine reads no boost nor vacuum. I figure
if I had a blown turbo charger I wouldn't hear it spool up, and I should
be a least reading engine vacuum. 

ANY ideas? Could the waste gate or the by pass valve be stuck open?

Any help would be greatly appreciated, I need to get my car back in shape
for track day on September 12-13 (Mosport).

Thanks,
Dwayne