No Boost Condition - Only Getting 1.0 Bar

[Mike Miller]

One thing you can do is to pinch off the hose from the WGFV to the WG 
with a pair of vice grips or something. Be *very* careful if you try 
that as the WG will not open, but if it gives you more than 1.0 boost, 
you know where to start looking. Broken WG spring, torn diaphragm, bad 
WGFV (but they usually fail with about 1.3 bar). A hose can look  OK 
when inspecting it and can still be bad under boost. I would think you 
would hear a boost leak if that was the case. Prime suspects would be 
the hose that runs up to the bottom of the BPV or the michelin man hose 
on the bottom side.

Take the cap off the WG and look inside.

--mike in montana
91 200q Hoppen stage 1
95 UrS6 with RS2 goodies

On 10/29/2011 9:00 PM, Shin Hoshikawa wrote:
> A friend of mine's 20VTQ has no boost pressure whatsoever. It only gets 1.0
> at full throttle.
> Otherwise, it runs and drives, although it feels like I'm getting less than
> 100 horses.
>
> I performed standard procedures to check all hoses, connections, bypass
> valve, and even
> made sure the turbo exhaust turbine spins and is not seized. Yes, it is
> still connected to the
> compressor turbine and it turns.
>
> Here is a potentially very important point. I'm not 100% sure but I don't
> seem to hear the normal
> turbo spooling sound.  This makes me think that I may have a faulty
> wastegate valve itself.
> Wonder if a wastegate spring is broken or valve is damaged?  Anybody BTDT
> before?
>
> I haven't checked all electrical components and sensors yet.  So, the
> problem could be elsewhere.
>
> I appreciate your any inputs you may have.  Thanks.
>
> Shin
>
>
>
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