[s-cars] occasional slight over-overboost

[Tom Green]

>
Don't think that "guru" stuff works here, JC.  : > )  Sure sign of too  
much time on
AW.  : > )

Call back when you have read codes.  You've got the cart before the  
horse
syndrome.

And, you have that "cranked WG spring" why, other than it came with  
the TAP
chips?  I would check out the WG.  The spring can override boost  
protection if
it is too tight--a sticky WG piston could alter how much spring  
tension is ok.
It is a stronger spring to begin with, so cranked down can be too much.

That MIL light blinking is a pretty good sign that DTCs are being  
stored in
the ECU, but it should cut fuel if it thinks the boost is out of hand.

Tom

> -----Original Message-----
> Date: Sun, 29 Mar 2009 09:37:51 -0400
> From: "JC" <jc at j2c3.com>
> Subject: [s-cars] occaisional slight over-overboost?
> To: <s-car-list at audifans.com>
> Message-ID: <09F9813EFADA4386AB3B26FB330B19D6 at SUPERSONIC>
> Content-Type: text/plain;	charset="us-ascii"
>
> Threw this question up on QW the other day to no avail (clearly "which
> wheels look best..." questions get more replies...) anybody have any
> suggestions?
>
> ------------------
>
> couple times the other day coming back down from mid-coast maine  
> under heavy
> throttle ramp-merge type situations my boost gauge alert went off,  
> and it
> looks like I was hitting a momentary peak of something like 1.6  
> gauge with
> my gauge alarm bleeping in protest.
>
> I have the gauge alarm set a hair above 1.5 and normally the peak  
> boost is
> rock-solid dependable at the exact point. this is the first time the  
> alarm
> has ever gone off.
>
> I think the MIL/CEL flickered at the same time once when this  
> happened. no
> haven't pulled codes yet and I will do, but MIL/CEL is not on now.
>
> any thoughts? I thought it the ECU wouldn't allow exceeding 1.5  
> without
> upgrading the MAP with and having corresponding software, but  
> perhaps I have
> a malfunction.
>
> oh yeah, patient details:
> TAP-crap chip, cranked WG spring, Stromung.
> runs perfect otherwise.
>
> only thing new-ish is that I recently removed the MAF screens but  
> the first
> few days of WOT testing didn't trigger this behavior. I can't get it  
> to
> reproduce every time but occaisionally it recurs.
>
> UPDATE: seems that maybe it will happen after every restart - i.e.  
> if it
> happens once I can't seem to get it to repeat.  but next time I  
> drive the
> car it'll happen again...
>
> thoughts from the gurus?
>
> ---- current ----
> 1995.5 S6 Avant
> ---- past lives ----
> 2006 A4 2.0TQA
> 1998 A6Q 2.8 PES G2
> 1989 200TQA SJM
> 1990 CQ
> 1997 A4 1.8TQ Wett
> 1987 4kCSQ
>
> John J. Cunningham
> <mailto:jc at j2c3.com> jc at j2c3.com
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