O2 stuff from the archives

[vw_85roccoZ400 at hotmail.com (Brian Spinney)]

Yes the scale is 0 to 1V.
Voltage from 0.80-1V being rich, and 0.40 to 0.55 being lean, and 0.55to 
0.70 is right about the range you are looking for.

However, I would check for vacuum leaks also, if there is a leak it is a 
killer of good idle.
-Brian
85 Scirocco 8VT
01 Wolfsburg Edition Jetta 1.8T
84 Rabbit GTI

98 Jetta GT-(Living Within Another)
90 Jetta Coupe- (Sold)
85 Scirocco Z400-(Wrecked)

----- Original Message ----- 
From: "Don Walter" <dswalterwi@gmail.com>
To: <roccit_53@scirocco.cs.uoguelph.ca>
Cc: <scirocco-l@scirocco.org>
Sent: Friday, November 18, 2005 9:14 AM
Subject: Re: O2 stuff from the archives


Usually it is 0 to 1V

On 11/18/05, C Boyko <roccit_53@scirocco.cs.uoguelph.ca> wrote:
>
> On 11:46:35 pm 11/17/05 Nate Mellom <doubt@inwave.com> wrote:
> > On Wednesday, *September 30, 1998* 8:15 PM, Shawn C Meze
> > [SMTP:skerocdriver@juno.com] wrote:
> > >
> > > On Wed, 30 Sep 1998 01:12:35 -0700 Salvatore Guzzo
> > > <yu129742@yorku.ca> writes:
> > > > What does this unit (O2 sensor) do for me anyways...
> > >
> > >
> > > Replace it if you dont know how old your's is. Its the key to the
> > > universe! Well, not exactly, its what controls the fuel system
> > > and you need it for the fuel system to work properly.
> > >
> There should be some voltage produced which goes to the DPR to fine tune
> what's going on fuel mix-wise. So detach the sensor plug (up near the
> firewall by the brake booster), it'll have a green wire on one end of it,
> but test the voltage coming off the sensor end. It should fluctuate,
> around
> 7V at stoich. if memory serves. You should get the car well warmed up
> first. The other two wires are just "in and out" power for the heater in
> the sensor. It's that other one you want to test. No voltage means a dead
> sensor. If it's off .7V (someone correct me if that's on the wrong scale,
> I'm useless at remembering numbers) it may mean your car is way rich or
> way
> lean. Then you can start screwing with DPR current, but not till you know
> your O2 sensor is working.
>
> HTH,
> cathy
>
>
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>



--
Don Walter - Waukesha, WI
1984 8V Audi 4000s (lastest addition)
1986 2.0L 16V TEC 2 Black Scirocco (see progress at
http://www.cardomain.com/memberpage/708939)
1986 2L 16V Toronado Red Scirocco (Ben's Car)
1988 1.8 16V Toronado Red Scirocco (sold on 3/29/04)
1984 1.8 8V Pewter Scirocco (sold years ago)
1971 Karman Ghia (sold)
1969 Karman Ghia (sold)
1969 Beetle (sold)
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