OK... this boost issue is driving me batty. I will read codes again tomorrow in the daylight, but can anyone suggest why boost would be fine (peaking at 15 or so, and stabilizing as 12lb or so) around town, but as soon as I get on the highway it all but cuts out (2 or 3 pounds at best). It seems to happen at around 45mph or so... it just peters out.

I am just about ready to can the whole vacuum system and go with a wastegate actuator of the type GSXR has added (bypassing the EGR in the process).

Any thoughts? Thanks all!

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)