[A4] Advice anybody...

[Stock, Nicholas]

Brandon, thanks for the advice. I just spoke to the guys at APR and they
suggested checking for any DTC's on the ECU..but alas I haven't got a
VAG...I think I'm going to spring for a ross-tech because I intend to buy
another Audi after this one anyway! Funny you should mention the waste gate
frequency valve (N75?) it was the next thing on the shopping list...

Regards,

Nick

-----Original Message-----
From: Brandon Rogers [mailto:brogers at terrix.com] 
Sent: Friday, June 25, 2004 8:13 AM
To: Stock, Nicholas; a4 at audifans.com
Subject: Re: [A4] Advice anybody...


Nick-
Other than a potential software issue, you might want to check the WGFV
(wastegate frequency valve).  I would try two things, first just unplug it
and see what happens- you should see lower boost because with it unplugged
the WG is relying solely on the wastegate spring to stay closed.  Next I
would swap in a known good WGFV- borrow from a friend or something if
possible.  Other than that..I don't know.

Good luck

Brandon
'98 A4
'84 urq 20V

----- Original Message ----- 
From: "Stock, Nicholas" <nicholas_stock at merck.com>
To: <a4 at audifans.com>
Sent: Thursday, June 24, 2004 6:22 PM
Subject: [A4] Advice anybody...


> Fellow A4 owners. I am asking for some advice/help. Last weekend a friend
> and I took the front of the car off and replaced all the braided vacuum
hose
> with silicone hose, replaced the tt diverter valve with a nice shiny forge
> diverter valve (very nice...) and also put in one of those polymer intake
> manifold gaskets..and it was all pretty straightforward. Why would I do
this
> you ask? Well apart from having fun and getting my hands dirty, I've been
> having over boost issues, whereby intermittently, wide open throttle would
> cause pressure levels of over 20 psi and make the car shudder a bit (not
> good). It does not do this in stock mode, only chipped mode (APR stage 1).
> The guys at APR suggested a vacuum leak and I concurred, but now I'm
> beginning to suspect that perhaps the waste gate on the turbo might be at
> fault. Any body else have any ideas?
>
> Many thanks,
>
> Nick
>
> Dr. Nicholas Stock
> Merck Research Labs San Diego
> 3535 General Atomics Court
> San Diego
> CA 92121
> Tel: 858-202-5314
>
>
>
> --------------------------------------------------------------------------
----
> Notice:  This e-mail message, together with any attachments, contains
information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New
Jersey, USA 08889), and/or its affiliates (which may be known outside the
United States as Merck Frosst, Merck Sharp & Dohme or MSD and in Japan, as
Banyu) that may be confidential, proprietary copyrighted and/or legally
privileged. It is intended solely for the use of the individual or entity
named on this message.  If you are not the intended recipient, and have
received this message in error, please notify us immediately by reply e-mail
and then delete it from your system.
> --------------------------------------------------------------------------
----
> _______________________________________________
> A4 mailing list
> A4 at audifans.com
> http://www.audifans.com/mailman/listinfo/a4




------------------------------------------------------------------------------
Notice:  This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates (which may be known outside the United States as Merck Frosst, Merck Sharp & Dohme or MSD and in Japan, as Banyu) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message.  If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system.
------------------------------------------------------------------------------