Date:         Tue, 1 May 2001 10:39:54 -0600
Reply-To:     Steve Blackham <steph@uswest.net>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Steve Blackham <steph@uswest.net>
Subject:      Re: Temp II voltages/rheostat
Comments: cc: Helen Fahy <72510.1173@compuserve.com>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

Joe
There is a chart of the resistances in ohms per any specific
temperature in the Pro Manual on page 18.  I think there is the same
chart in Bentley.

It shows about 1000 ohms at current startup temps. i. e. 70 degree F.
and about 100 ohms at warm engine 120 degrees C or around 200 degrees
F.

  I've been thinking  about adding a rheostat in line with the temp 2
sensor, but that won't work will it. I'm not a "electron chaser" ,
but wouldn't the rheostat give you more resistance  not less.

So much for that idea.  I guess its time to buy a factory temp 2
sensor.  the after market one seem to run colder thus richer.  Does
anyone have any solutions to this.

Steve



Date:    Tue, 1 May 2001 07:55:39 -0400
From:    Helen Fahy <72510.1173@compuserve.com>
Subject: Re: Temp II voltages

Thanks for replying Mark.

My Westy is a 1987.

I have been thinking about substituting a rheostat for the Temp II sender so
that I can control that variable. I could then  observe the O2 voltage as a
function of the TII voltage.  Perhaps more importantly I could observe the
drivability as a function of TII voltage.

Has anyone solved for the resistance of the TII sensor from the observed
voltage across it and correlated this with a water temperature measurement?


Joe

--
Steve Blackham
Centerville, Utah

77 transporter converted to camper (Westy top)
83 Vanagon  (New and current project)
87 Weekender