o2 readings

[Bruce Plecan]

> the o2 sensor is a Sorensen 779-7020, I bought it some time ago and just
had
> a bung welded in.
> I do not know if this is from a gm tpi application or not, I thought that
> they were all pretty much the same.

There are differences.
Response times, and actual switching voltages seem to vary some.
Bruce

> does the wiring I have look right ? red=+12v, black = gnd, and white is
the
> sensor ?
> it varies between 11.09 at idle up to 36 mv with partial throttle. It
takes
> about 45 seconds or less for it to warm up and give me some readings.
>
> thanks, Diane
>
> thanks, Diane
> ----- Original Message -----
> From: "Programmer" <nwester at eidnet.org>
> To: <gmecm at diy-efi.org>
> Sent: Monday, January 01, 2001 3:30 PM
> Subject: Re: o2 readings
>
>
> > You're using a 3 wire heated ? Ok--happen to have the part number
> > handy ? With the numbers that low, the ECM is going to command
> > longer pulse on the mixture control solenoids--and go full rich.
> >
> > Lyndon.
> > -----Original Message-----
> > From: Diane Stowe <dianes at speakeasy.org>
> > To: gmecm at diy-efi.org <gmecm at diy-efi.org>
> > Date: December 31, 2000 2:14 PM
> > Subject: o2 readings
> >
> >
> > >Hello, a question. I thought I would test my newly installed 02 sensor
> > prior
> > >to my installing the new map tpi. I have a quadrajet on it now.
> > >
> > >I presumed that the red and black were 12v+ and -, and that the gray
lead
> > >was the sensor reading. The sensor is welding in a bung that is about
5-6
> > >inches below the passenger side exhaust manifold.
> > >
> > >anyway, with 12 to the o2 heater, which is on all the time, I get 11mv+
> at
> > >idle and somewhere between that and 36+ mv on driving up hills or
> > >strightaways.
> > >It never goes below that, or negative. Is this what I should be seeing
?
> my
> > >rpm never gets above 2300 due to the 700r4 and the 2:88 rear I have in
> the
> > >car. I am trying to track down the cause of the poor fuel mileage, it's
> > >about 10 mpg. that with a custom grind crower street cam, a new timing
> > >chain, a edelbrock performer and recently 21/2 inch pipes from the
> exhaust
> > >headers to the front mufflers and the installaiton of a crossover pipe
> > after
> > >the transmission. sadly none of these changes have helped much. I'm
> > assuming
> > >that the quadrajet is just running too rich, however I am not sure from
> > >these readings.
> > >
> > >thanks, Diane
> > >
> >
>
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