[s-cars] ARGH!! Stalling at idle

[Mark Pollan]

Hi Tom:

Brand new (5K miles) non, splice Bosch unit on the O2S.  MAF is original.  I
do have a leak at the turbo end of the MAF to Turbo hose under/around the
hose clamp.  I just don't see how with the cross-section of that hose that a
small leak there would allow enough un-metered air go by.

I am throwing code 561 "Mixture Adaptation"  15-10 Adaptation Limit (Add)
Not Reached - Intermittent.  Display group 00, field 9 (O2S Adaptation)
reads low.  Spec is 100-141 and I'm at 63.

I got a new 710N BPV the other week so when I put this in this weekend I'll
have a real good look at the MAF to Turbo. My fingers are crossed as that is
dealer only and pushing $200.

Regards and thanks for your thoughts!

Mark

-----Original Message-----
From: Tom Mullane [mailto:tmullane at snet.net] 
Sent: Saturday, February 12, 2005 8:07 AM
To: mark.pollan at mci.com
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] ARGH!! Stalling at idle

Mark,

What is the story with the OXS?  You say it is almost new, but is it the
right sensor?  Is it a splice job?  You might want to try swapping in a
known good OXS and see what that gets you.

My money is on either the MAF, OXS, or a tear in the boot between the MAF
and the turbo.

Tom



Date: Fri, 11 Feb 2005 19:56:14 -0500
From: "R. Mair" <waves at comcast.net>
Subject: Re: [s-cars] ARGH!!  Stalling at idle
To: "Mark Strangways" <strangconst at rogers.com>,
	<s-car-list at audifans.com>
Message-ID: <0ca301c5109d$a9e5d990$d96a5244 at Dell>
Content-Type: text/plain;	charset="iso-8859-1"

sorry if i'm getting this problem mixed up with all the other diagnostic
problems i deal with everyday. Cold start and cold run are two different
problems. Anyway, the 02 sensor if heated will come online in short order,
within 15-30 seconds after start-up. This could cause a problem if the
sensor itself is shorted to ground, but not likely if it is simply lazy.
Simple test here is to unplug the 02 sensor and see if the problem goes away
or at least changes gretly. Same can be done with the MAF i believe. It
works well on an OBD2 car, haven't tried it on OBD-1 but i can't see that it
would be a whole lot different.

Rolf