Re: Non-heated OXS in place of heated unit

["M Tipton" <miktip@worldnet.att.net>]

> From: Allan Jones <ampj@tiac.net>
> To: K1drbar@aol.com
> Cc: Mike Tipton <miktip@worldnet.att.net>;
quattro@coimbra.ans.net
> Subject: Re: Non-heated OXS in place of heated unit
> Date: Sunday, June 15, 1997 04:29 AM
> 
> K1drbar@aol.com wrote:
> > I just found what that open two pin connector is for on
my '85 4kQ ...
> > the heater for the OXS!  Apparently someone replaced it
with a non-
> > heated (cheaper) unit somewhere along the way.
> 
> plugs(not that impressive, but still pretty good!), but
now I need to
> know whether I should buy a heated one or not.

The heated element provides for better control of emissions
"earlier"
in the "start" cycle phase of fuel controlling.
Reason being is the non heated sensor takes quite a few
minutes
of driving to get up to operating temp, and operating
range.
By using a heated sensor this operating range can be
achieved much sooner!
Then as an auto manufacturer, you can claim better emission
reductions
"overall" since the emissions starts controlling sooner,
and better!

Remember I told you once to make sure the car is warm when
you take it to be 
smog checked!
> 
> Steve and List,
> 	Can anyone give me the proper OXS sensor unit(preferably
the
> manufacturer-Bosch? 

There are 3 sensors that can be utilized on your coupe!
1-the 3 wire heated, but depends weather you use the Audi
part #034 906 265F
or the Bosch #.(0 258 001 051)
2-the Bosch 1 wire, standard part, Audi#200 906 265,
Bosch#(0 258 001 026)
3- the Bosch "universal", Part #(0 258 001 027)

The Bosch Universal I aquire from Autozone for $20!  So I
have to solder in its wire.
Functions the same as all the above, and costs the least
out of the three!

The heated unit costs over $100!  

>and exact part number) that I should be using on my
> Coupe-GT utilizing only a Jacob's Electronics Omni-Pak
and a K&N air
> filter, and with a Leistritz exhaust and a Midas(sshhh!)
cat. I doubt
> those mods matter to the part number, or type of OXS
sensor, but I
> presently don't 'know' that for sure.

These "toys" make no difference to which ox-sensor you
utilize!

> Is it heated/should it be? Is it a
> 2-wire or a 3-wire/should it be? Is it the connector type
or do I need
> to do some soldering as was recently mentioned?

Depends on how much money you want to spend, how much
"cleaner" you 
want to make the environment, and whats available in your
area!

> > suppose that the smog tech could fail me immediately if
he notices
> > that the unit is not heated, but I dont think they
check that.

99.9% of the "smog technicians" haven't got a clue!
> 
> 
					M