Date:         Tue, 4 Jul 2006 12:33:20 -0400
Reply-To:     Matt Sutton <msutts@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Matt Sutton <msutts@EARTHLINK.NET>
Subject:      88 digifant O2 readings off
Content-type: text/plain; charset="US-ASCII"

Hi folks,

Preparing for NY emissions today, and have run into some weirdness with my
O2 readings.

Test conditions: Engine at opperating temp
                 O2 sensor disconnected at attached to digital voltmeter
                 Idle stabilizing valve disconnected
                 Idle set ~900-950 rpm
                 Temp sensor disconnected after start up

Test Readings at O2 Sensor: -.54v at start
                            -after a minute, reading fluctuates but
                                averages .5v
                            -when temp sensor's disconnected, reading jumps
                            to .9v and pretty much stays there. Very small
                            adjustments possible at AFM, but nowhere near
                            where needed to reach the .5v target. There is
                           the some upward movement available, as high as
                            1.2v.

    So it's this last result that's troubling me. The van runs fine. And
while it misses a little at idle, it always has. I know the 02 sensor's
doing it's job, but am worried about leaning too hard on the Cat and ECU to
compensate.

    Any thoughts?

    Happy 4th,

        Matt Sutton
        Brooklyn NY
        88GL