Date:         Tue, 11 Sep 2007 19:24:01 -0700
Reply-To:     Mark Drillock <mdrillock@COX.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mark Drillock <mdrillock@COX.NET>
Subject:      Re: My poor MPG, O2 sensor seems okay
Comments: To: "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
In-Reply-To:  <46E5C978.7020107@gmail.com>
Content-Type: text/plain; charset=us-ascii; format=flowed

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
>