[s-cars] WGFV

[Tom Green]

Gotta agree with you there, Teddy.  It ain't much of a test, but it  
does verify electrical continuity, and running with the vacuum line  
off will verify how much
boost the WGFV adds.  Since Eric reported pretty steady boost levels,  
I would look for bypass valve problems and vacuum leaks before  
replacing the
WGFV.  A swap to check would be nice, if you had a spare or a  
friend's s-car handy, before spending the $90.  Or, maybe these  
things just wear out
after 12 years.

Once you connect VAG-COM checking for fault codes, you might as well  
use the capability.

Tom

On Mar 15, 2007, at 10:31 PM, Theodore Chen wrote:

>
> Tom Green <trgreen at comcast.net> wrote:
> If you have access to a VAG-COM, the output test cycles the WGFV so  
> you can hear/feel it operate, and you can disconnect the vacuum  
> line from the wastegate to also verify operation.
>
> the output test is useful only if the WGFV fails the test.  i had  
> problems with inconsistent low boost.  sometimes i got normal  
> boost, and other times i just got wastegate spring pressure (about  
> 6 psi).  the WGFV passed the output test.  after i tested a number  
> of other things, i kept coming back to the WGFV, which passed the  
> output test every time.  the output test actuates the WGFV about  
> once every second, and i suspected that the WGFV was failing at  
> higher duty cycles.  replacing the WGFV fixed the problem.
>
> -teddy
>
>
> The fish are biting.
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