fwiw..........
I get vanagon engines to run perfectly...........takes a while
sometimes...........but eventually I can get them to run as  good as a
waterboxer  engine can possibly run.........
and I almost never change a Temp II sensor.
I have seen problems with making good contact to them though.

----- Original Message -----
From: "Don Hanson" <dhanson928@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, May 26, 2009 10:54 AM
Subject: Re: intermittant rich running problem

> It sounds like it is the temp II sensor.  Check the plug on that and the
> wires...Mine are all brittle and the plug sucks.  If you unplug the Temp
> II
> and the running behavior doesn't change...that is probably it..some kinda
> connection issue...since you say you know the sensor is good again.  Those
> things (the sensors themselves) are sometimes no good even when
> new..Bosh..
>  Don Hanson
>
> On Tue, May 26, 2009 at 8:04 AM, David Clarkson <Dvdclarksn@aol.com>
> wrote:
>
>> Just a follow up to the previous post. The oxygen sensor voltage seems to
>> be swinging between .1-.7 volts with the engine warmed up. Thanks for any
>> help  that you can offer fellow vanagonauts.
>>
>> David
>>
>>
>> In a message dated 5/26/2009 10:34:31 A.M. Eastern Daylight Time,
>>  Dvdclarksn@AOL.COM writes:
>>
>> I'm  having an intermittent rich running problem with my 90 2.1 liter
>> Westy.
>> This was the same symptom that I had that was fixed 13 mos. ago with  a
>> new
>> temp  II sensor. This has been replaced with no effect. One  other
>> interesting thing  that I noticed when attempting to install a  wire to
>> feed an oxygen
>> sensor  monitor was that just connecting an  additional wire to the
>> sensor
>> causes an  immediate rich running  condition. I had a problem this
>> morning
>> when the engine  was started  cold with running rich also. Am I looking
>> at
>> a
>> problem involving   cleaning up some grounds again. I'm thinking that I
>> may
>> also
>> need to test  the  voltage coming from the sensor and also at the ECU.
>> Any
>> ideas  towards diagnosing  this problem would be greatly  appreciated.
>>
>>
>> David  Clarkson
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