[s-cars] Diminished Boost

[djdawson2 at aol.com]

 The BPV, the line to the BPV from your IM, and the line from the IM to the ECU would be my first suggestions of places to look.

A leak won't result in more boost, just typically a rich mixture... or worst case, it won't run at all.


 


 

-----Original Message-----
From: dgraber460 at aol.com
To: bhowell at rmi.net; Djdawson2 at aol.com; seiche at shadetreesoftware.com
Cc: s-car-list at audifans.com
Sent: Tue, 7 Apr 2009 1:22 pm
Subject: [s-cars] Diminished Boost










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
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