[V8] mixture adaptation/idle issue

[Coleman, David]

This is especially interesting to me -- I had this code and swapping a
MAF resulted in improved drivability and a different code (bad OXS).
Runs great w/ OXS unplugged; runs horribly with it plugged in.  Replaced
the thing 2x.  Anyway...

Per SJM Autotechnik (and the manual), your code indicates:
- Too Lean or Too Rich
- Vacuum or hose leak(s)
- Fuel Pressure problem

Do you get any smoke out the tailpipes when starting, especially when
cold?  If so, how long does it remain?

How does it drive?  Any sputtering or hesitation?  I'm not referring to
the ubiquitous "surge" characteristic -- rather a fuel starvation or
over-ignition sensation.

And have you looked at any of the PCV hoses?   Somewhere there's a
diagram of their location I can dig up if this isn't ringing a bell for
you.

Dave
 

> -----Original Message-----
> From: v8-bounces at audifans.com 
> [mailto:v8-bounces at audifans.com] On Behalf Of John Dodd
> Sent: Wednesday, February 08, 2006 4:57 PM
> To: Coleman, David
> Cc: v8 at audifans.com
> Subject: RE: [V8] mixture adaptation/idle issue
> 
> It did not cost anything for the codes.
> The code I got was 2413.
> I changed the OXS and FP regulator about 15 000 km ago.(3 
> years ago) Did not wash the engine or drove through rain.
> I did clean the ISV valve but not the TPS.
>  John 
> 
> 
> -----Original Message-----
> From: Coleman, David [mailto:David.Coleman at blackrock.com]
> Sent: Wednesday, February 08, 2006 2:48 PM
> To: John Dodd; v8 at audifans.com
> Subject: RE: [V8] mixture adaptation/idle issue
> 
> That's some sort of OXS code.  You went to the dealer to have 
> them tell you that?  What'd that cost?  And what home-job 
> codes did you get beforehand?
> 
> I don't remember where this thread left off, but unless 
> there's some obvious problem elsewhere, unplugging or 
> replacing the OXS is a standard first stop for an 
> idle/running issue.  Once that's done, you'll start down the 
> old road of fuel pressure regulator swap (recommended every 
> couple years I think) and cleaning/replacing the idle 
> stabilizer and throttle position sensor.  Had you washed the 
> car or driven through a massive downpour recently?
> 
> DC
> 
> 
> 
> > -----Original Message-----
> > From: v8-bounces at audifans.com
> > [mailto:v8-bounces at audifans.com] On Behalf Of John Dodd
> > Sent: Wednesday, February 08, 2006 4:18 PM
> > To: v8 at audifans.com
> > Subject: [V8] mixture adaptation/idle issue
> > 
> > As a follow up to the ongoing saga that started almost 2 months ago 
> > here is the latest:
> > I went to the dealer to have the codes read even though I did it 
> > myself.Here is the readout:
> >  
> > 00561 Mixture adaptation
> > Adaptation limit( add.) exceeded
> >  
> > The idle on the car goes down to 300 -400 rpm in drive then back up 
> > again to normal..Power seems Ok but not as before.It even 
> idled Ok for
> 
> > awhile .(intermittent issue ?) Any suggestions ?
> >  
> >  
> >  
> >  
> >  
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THE INFORMATION CONTAINED IN THIS MESSAGE AND ANY ATTACHMENT MAY BE PRIVILEGED, CONFIDENTIAL, PROPRIETARY OR OTHERWISE PROTECTED FROM DISCLOSURE. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, copying or use of this message and any attachment is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and permanently delete it from your computer and destroy any printout thereof.