Boost problems

[Eyvind Spangen]

I'm only getting 1.7 bar indicated on the dash gauge. I have checked
for leaks, replaced bypass valve and WGFV, I even tried blocking the
hose to the wastegate, but then I only got 1.6.. I tried using
regulated, pressurized air on the small line to the ECU, I adjusted it
to about 2 bar absolute pressure, the dash gauge shows 1.9 max. With
the standard pressure transducer should this be correct, right?

But I still wonder why it doesn't give full boost, even with the lower
wastegate hose blocked off.. When I did this on my old 200q10v, it hit
the overboost cutoff very quick..

I removed the top cap on the wastegate, everything looked normal in
there..

I tried pulling codes, nothing.. (4444)

Any good tips? I'm really puzzled..


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E. Spangen
'90 Audi 200TQ20v