Re: V8 O2 Sensor check....

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On 18 May 1996, Michael LaRosa wrote:

> I took my new shiny Sunpro 7678 meter and measured the Sensor

Bravo, you'll find alot of things are much easier with this tool in your box.

> and the sensor measured .440 +/_ .002 or so. I ran  for about 5-7
> minutes and the sensor went as low as .436 and as high as .442.

Sounds reasonable.  I wonder if the meter is measuring an average over
time.  That would mean that your V8 idles a little lean of stoichiometry -
probably OK. With an O2 sensor meter, you will see the fluctuations in the
O2 sensor output.  I would guess that .3 - .8 volts would be common. 

> Then I shut off the car and restarted it, the sensor jumped .458 and
> settled in again to .441 with a second or so.

Sounds like your ECU is competant.

> This seems to be ok, yes ?

Yes.

> Then put the 7678 on 200 ohms scale and measured across
> the heater wires with the engine off.  I get 5.2  Is this correct ?

I don't know what the spec is, but this sounds reasoanble.  Any heater 
that I have ever measured has been in the 3-7 ohm range.

Later,								
Graydon D. Stuckey								
graydon@apollo.gmi.edu								
Flint, Michigan   USA
'86 Audi 5000 CS Turbo Quattro, GDS Racing Stage II