[s-cars] Diminished Boost

[dgraber460 at aol.com]

Gents;
Of late my RS2'd S6 has started to feel a bit anemic. I finally noticed that the boost has dropped off from the usual peak of 27 down to 20-22. Am?I right that a system leak will actually result in overboost as the turbo keeps spooling with less resistance? Without a garage or air compressor I can't pressure test it anyway.
I'm thinking the bypass valve may be leaking and need another cleaning? I swapped?the aluminum unit from the URQ 3B into this car last July after it had started "moaning like a sick cow" in that car, and I needed a good valve for the Glenwood event. I took it apart and cleaned and lubbed it up, and it worked fine till now.
The plugs are all torqued, and it doesn't miss fire at all (swapped a different set of 1.8 coils last night - no change), just low boost and lethargic power. The URQ is in storage so I can't just swap cars like I used to.
Any other suggestions?


Dennis
Denver
720-838-0558