lean at idle

[Hayes Myers]

Yeah. Stock O2.   (homebuilt LED gauge).   Hmmm. seems there is pretty fast
response but could be wrong on that one.  Does this really mean I have to
pull codes??? Yuck.  Got a led test light...having wonderful time plugging
into the test points on driver side. Since my ECU is hanging I think I'll go
direct to the ECU for ease of connection.

-----Original Message-----
From: Brett Dikeman [mailto:brett.dikeman at gmail.com] 
Sent: Wednesday, April 29, 2009 4:43 PM
To: Hayes Myers
Cc: one at humanspeakers.com; quattro at audifans.com
Subject: Re: lean at idle

On Wed, Apr 29, 2009 at 4:10 PM, Hayes Myers <hayesmyers at gmail.com> wrote:
> It will eventually recover at idle and read normal...then it will drop off
> (like it stumbles a bit) and will read lean...then bump back into green
> again.

How are you measuring A/F ratio?  The stock O2 sensor?  If so, how old is
it?

O2 sensors don't fail completely, they just respond more slowly as
they get clogged up.

Brett