o2 readings

[Diane Stowe]

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.

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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