Underboost: '90 200 TQW IA Stage 1

[Tom Forhan <tforhan@usa.pipeline.com>]

Well, after 15,000 miles of trouble free ownership (ah, except the fuel
pump replacement), the gods have finally bit. 

Max boost, formerly 1.7 or 1.8 bar, is now 1.4. Car seems to run fine up
to that point. I did a visual inspection of the turbo hose and it looks
ok: rubber is in good condition, no visible holes, cannot feel anything
amiss on the underside.

I know this has been discussed before, but I cannot find it 
in the archives. Any and all hints will be most appreciated.

Thanks
Tom F.