nate:

the O2 sensor output voltage is checked while connected, in normal closed
loop operation. the high value of 0.9 V would be expected for rich mixture
due to open loop, or limp home mode, with sensor disconnected. efi
requires output from O2 sensor to optimize mixture.

dan

On Tue, 15 Mar 2005 05:31:01 -0800, Nate Saylor <nates@IMPULSE.NET> wrote:

>As my saga goes on.  I checked my O2 sensor voltage, now that the idle
>had settled down.  On hot engine (off) I disconnected it then turned on
>the engine to check sensor voltage.  With the sensor disconnected it
>started to hunt idle again, not surging as bad but still definately
>wrong.  O2 sensor would fluctuate between .5 on one side of the idle
>oscillation to almost 1.0 on the other end.  Put another half turn on
>the screw (clockwise) to see what would happen.  It stopped fluctuating,
>but the idle was not strong and the sensor stayed at around .9v.  GRRR!
>Any further help guys?  I'm really getting frustrated after so much work
>to fix the heads to be held up by this kind of stuff.
>
>
>-nate