[s-cars] O2/Lambda sensor question

[Mark Strangways]

In addition, check or just plain change the Thermostat.
I have had issues with car not quite getting to temp (and taking it's time) 
and it makes for horrible fuel economy.

Mark S
----- Original Message ----- 
From: <djdawson2 at aol.com>
To: <paul.heneghan at bbc.co.uk>; <s-car-list at audifans.com>
Sent: Friday, January 06, 2006 12:13 PM
Subject: Re: [s-cars] O2/Lambda sensor question


> When the O2 has failed, the default "safe" mode is a rich mixture.  That 
> is why it is black.  Just replace it.
>
> The MAF is not a routine maintenance item, unless you're running too much 
> turbo  ;)
>
> Dave
>
> -----Original Message-----
> From: Paul Heneghan <paul.heneghan at bbc.co.uk>
> To: s-car-list at audifans.com
> Sent: Fri, 6 Jan 2006 17:06:19 -0000
> Subject: [s-cars] O2/Lambda sensor question
>
>
> My mpg has dropped enormously over the last couple of months.  It's
> dropped from an indicated mid 20s to about 20 (I presume these are good
> old-fashioned UK gallons, not the puny little 80% US type).
>
> First off, the car seems to be taking an age to get to temperature - in
> fact channel 51 only seems to ever get to 79, even when the dash gauge
> shows the normal temperature.  I plan on changing the engine thermostat
> - I think I'm still on the original which is 10 years old now.
>
> I thought I would change the O2 sensor as I'm pretty sure the original
> is still in there.  When I took the old one out, it was covered in soot.
> Do I need to look at something else, or could the rich condition be due
> to the cold engine, and a failing O2 sensor?
>
> Can you scrape the soot off and reuse them?
>
> What about MAF?  DO they need to be replaced as a matter of routine?
>
> Paul
> 1995 S6 Avant
> 1996 S6
>
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
>