[s-cars] Overboost and fault codes

[Tom Green]

If the etc. in your equipment list includes a set of Samco boost  
hoses, then one of the clamped ends has probably slipped off the  
Michelin Man hose where
the intercooler slows down the flow and pressure rises.  Oil collects  
here and makes things more slippery as well.  If they are not  
silicone boost hoses, start
looking for the split hose by what ever means you like best, poking  
with your finger, just looking, or pressurize the boost tract with a  
Home Depot plastic
pipe fitting and air compressor, because you have a boost leak.  Oh,  
check that boost line to the ECU that is routed from the intake under  
the ignition
connection cover on the firewall, to ensure the line has not blown  
off the inline filter.

No guarantee with this, Gregg, but this is the most likely scenario.   
It also could be a vacuum line leak, but the severe bucking says  
boost leak.  I would
check the vacuum line from the wastegate to the WGFV before I  
uncapped the wastegate to look at the diaphragm.  You want to make  
sure you don't
create a problem rather than fix one.
If this stuff was so well done, why are you having such elementary  
problems already? :-)

Tom

> Date: Thu, 14 Sep 2006 18:02:55 -0700
> From: "Gregg Dorris" <gdorris at comcast.net>
> Subject: [s-cars] Overboost and fault codes
> To: <s-car-list at audifans.com>
> Message-ID: <000a01c6d862$ae195c10$6700a8c0 at KITCHEN>
> Content-Type: text/plain;	charset="iso-8859-1"
>
> I am a new owner of a 1993 S4 with RS2 turbo, manifold, cam, etc,  
> done well. When boost approaches 20 lbs., the engine bucks as the  
> ECU cuts fuel and goes into limp home mode. Fault codes are 2413 -  
> " Mixture Adjustment, Adaptation limit exceeded, Symptom: Rich  
> mixture, increased fuel consumption" and 2224 -  "Over boost  
> condition Waste gate or pressure hose, Waste Gate Solenoid/hose  
> problem" (thanks Scott - sjmautotechnik.com). I plan to check  
> wastegate diaphragm - any other ideas?
> Gregg
>
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> End of S-CAR-List Digest, Vol 35, Issue 58
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