[V8] 2002 A6 Quattro V8 4.2L. Starting problem

[John Bysinger]

If replacing all 4 O2 sensors is a financial concern, you can bench test O2
sensors using a Volt/Ohm meter and a propane torch.  I believe these will
be 2 wire sensors (someone can correct me here) so testing should be easy
with the VOM meter.  If it's a multi-wire sensor (3-4) the wires you want
will be the only ones generating voltage, not too difficult to figure out.

good video on the subject
http://www.youtube.com/watch?v=stFhLSHsOGg

This can help identify which sensor is faulty.


On Sun, Aug 18, 2013 at 9:06 AM, Kent McLean <kentmclean at comcast.net> wrote:

> John Zofchak wrote:
>
> Congrats one the new ride.
>
>
>  I live very in a very remote area and need better reliability than this.
>>
>
> Oh. An 11-year-old Audi would not be my first choice for reliability. But
> it seems you have the culprits dialed in, so here goes...
>
>
>  I have purchased new Davico Catalytic converters, N 80 valve, O2 sensor.
>> Also got Irridium plugs, A Vortex generator, A K&N air filter.
>> Was wondering if doing the converters is a DIY job or best left to the
>> pro's?
>>
>
> Are the converters OEM plug-and-play? Or are they generic items that need
> to have flanges welding on the fit into the Audi exhaust?  If the former,
> you should be able to bolt-it-up. If the later, find a good welder, as most
> shops won't be happy with you bringing in your own parts.
>
> The V8 is a tight fit in an engine bay meant for a v6, so you may have a
> challenge with even simple tasks.  IIRC, your V8 has 4 O2 sensors; you may
> find yourself replace all 4 before you are through.  There are instructions
> on the web for using a cheap Ford Mustang 02 sensor, and either splicing a
> Ford sensor connector in place of the Audi one so the Ford 02 sensor plugs
> right in, or replace the connector on the end of the 02 sensor so it plugs
> into the Audi connect.
>
> Good luck.  I really enjoyed the test drive I took a few years ago, but
> reliability issues and parts costs turned me off.
>
> --
> Kent McLean
> '02 VW Beetle TDI, and lot of former Audis, including Bad Puppy
>
>
>
>
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-- 
john at bysinger.net