Fault code 2221? 5k Tq

["Sherry & Chuck Clark" <clark@rmi.net>]

 Hello Q-heads,

        Well I knew it was going to be a good day when I was rolling down the 
passengers window and it more or less fell into the door cavity-Enter laughing 
and pointing fingers from the Audi Gods! Oh well, new regulator on its way as the
 window was acting up anyway for a month. But the  Gods didn't stop there.
While passing a Taurus SHO :-)  I noticed the dreaded orange check engine light
 come on and the immediate loss of boost back down to 9 psi as indicated on
 my auxiliary boost guage. Another couple of runs from a dead stop yielded the 
same problem with the light staying on at anything over 7 psi boost. BEFORE shutting the 
engine off, I pulled the codes to reveal a 2221 which says: Vacuum hose to Pressure 
Sensor in control unit-Culprit: Vacuum hose disconnected, leaking or plugged. After 
searching for anything obvious like a disconnected hose, I have found nothing. 
Could the problem be in the ECU itself? Is there a pressure sensor inside the ECU? 
BTW, this is an IA stage II box that I've been trying out. I may put my TAP box back in 
to see if the problem persists.  Here's a wierd twist though- After shutting the car down
and running the car, I get full boost to 15 psi and no light? HUH? So it's definitely an
intermitant problem.

 Anyone out there have the same problem or know 
where I may turn to next? Any help would be greatly appreciated and just might keep 
the Audi Gods off your back:-)  TIA,

Chad Clark '87 5k Tq