I just put an O'scope on the O2 sensor wire of my recently acquired 87.

At first it sat around .4-.5 volts and after warm up, the signal
switched back and forth 1-2 times per second. Low end was 0.05 volts,
high end 0.8 volts, jumping quickly between and not always reaching
those peaks.

Mark

Mike "Rocket J Squirrel" Elliott wrote:

> As I've posted previously, my 84 1.9L auto only gets about 15.5 MPG
> while others have reported somewhat higher mileage. Even after filtering
> out those who seem to be quite optimistic, and paying especial attention
> to those who deny not keeping careful records, Mellow Yellow still
> trails the pack. It gives us great sadness.
>
> It has been proposed that my poor numbers might be due to a funky O2
> sensor, or crummy compression. I'll get to the compression tomorrow or
> the next day, but right now I have hooked up my handy-dandy voltmeter to
> the sensor and with the engine warmed up, it is outputting between .36
> volt and .66 volt, ranging around about .55 volt. This seems kinda
> normal, from what I read.
>
> --
>
> Mike "Rocket J Squirrel" Elliott
> 71 Type 2: the Wonderbus
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
> KG6RCR
>