[s-cars] Going insane... UrS4 falling on it's face at WOT

[rcaro900ss at aol.com]

Do you have a Stromung down pipe? I had a broken weld at the O2 sensor that created all sorts of similar havoc.

Robert 
Sent via BlackBerry by AT&T

-----Original Message-----
From: Darin Nederhoff <scarsgo at gmail.com>
Sender: s-car-list-bounces at audifans.com
Date: Sun, 17 Jul 2011 18:02:45 
To: Wayne Dohnal<wd43 at hevanet.com>
Cc: S-car list<s-car-list at audifans.com>
Subject: Re: [s-cars] Going insane... UrS4 falling on it's face at WOT

It gets better. I'm now broken down in Faribault, mn with a car that
cuts out when I give it any gas at all. Codes 2223, 2413, and 2342.
Lately I hate my car.

Darin Nederhoff

Sent from my iPhone
612.293.6575


On Jul 17, 2011, at 3:39 PM, Wayne Dohnal <wd43 at hevanet.com> wrote:

> I'm chasing a similar problem on my stock '94.   The behavior is clearly visible on the boost gauge:  After I run at full boost (~15 psi) for a second or two, the ecu cuts the engine off.  If I hold the pedal down, the car bucks like crazy between full power and fully cut off.  Once I cause this situation, the engine cutoff occurs at 5 PSI until I do an engine shutdown and restart.  Then the cutoff point goes back to 15 PSI.    I've improved the situation some by fixing a loose hose on the moisture trap under the plastic cover by the firewall.    I'm getting a code 2413 "mixture adjustment".  The MIL light isn't on, which the Bentley says it is with a 2413 code.
>
> I've given the MAF sensor a good cleaning and I'm going to try replacing my never-replaced bypass valve.  Have you replaced yours?  I didn't see it on the list of new parts.  Other suggestions appreciated.   The Bently lists a lot of possible causes for the 2413 code  Is there any particular thing that's usually behind it?
>
> Wayne
> 1994 S4
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