Date: Fri, 28 Dec 2012 22:08:29 -0800
Reply-To: Stacy Schneider <vwcrewman@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stacy Schneider <vwcrewman@GMAIL.COM>
Subject: Re: O2 sensor type problem after replacing O2 sensor
In-Reply-To: <50DE1030.3080004@turbovans.com>
Content-Type: text/plain; charset=us-ascii
-Stacy
On Dec 28, 2012, at 1:33 PM, Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> wrote:
> I havenot run into the problem of a shorted 02 coax myself,
> but i have read about it,
> and I have seen a whole new coax wire tapped into the original one near
> the ecu.
>
> re " when the coolant temp sensor told the ECU to turn the heater off on
> the sensor. "
>
> Oxygen sensor heat is full time, any time thekey is on, from the main
> relay, pretty sure.
>
> scott
> turbovans
>
> On 12/28/2012 10:39 AM, David Clarkson wrote:
>> Greeting vanagonauts. I recently (approx 500 miles ago) replaced my O2
>> sensor after having a problem with my 1990 Wesfalia that caused it to
>> bog down and quit running after warming up. I am assuming that this
>> happened when the coolant temp sensor told the ECU to turn the heater
>> off on the sensor. When I unplugged the sensor the problem went away.
>> Since my sensor had more than 60K on it which is the VW replacement
>> interval, I replaced the sensor. After Installing the sensor
>> everything seemed to be back to normal. One other bit of info that is
>> worth mentioning is that I have an O2 sensor monitor that indicated
>> that everything went completely rich when the problem occurred. It
>> showed this type reading with the original sensor issue and the new
>> sensor issue. My thoughts are that the problem might be with the small
>> guage coax type cable that sends the sensor signal to the ECU
>> grounding out from the inner sensor wire to the outer metal sheathing
>> that I believe is grounded to the chassis. I had a similar problem
>> with this cable once before and I believe that I cut a small piece off
>> of the end and put the connector back on. Knowing that most types of
>> coax cable will eventually fail, I am wondering if anyone has had a
>> problem similar to this with this cable and if so where did you find a
>> replacement. I believe that it is wrapped with the other wires in the
>> main harness section that goes to the ECU so I would probably just run
>> another piece that would be wire-tied to it rather than risk
>> disturbing the rest of the original harness and causing a problem with
>> another wire. Maybe there is another problem. I think that if it were
>> a problem with the not so old coolant temp sensor I would have some
>> type of symptom with the O2 sensor unplugged. I thought that I would
>> pick the collective craniums of the group since, as is usually the
>> case someone has BTDT with this issue. I'm just not the type to want
>> to continue riding around with the o2 sensor unplugged with the price
>> of gas and the extra emissions that I would produce that are not good
>> for the environment or my catalytic converter. Thanks for any input
>> that you have. I am suddenly having to drive my older van a lot due to
>> a temporary employment situation and it's begging for attention.
>>
>> David Clarkson
>> 90 Westfalia about 200 mi short of 300K-now what will I get it or do
>> for it for this milestone birthday? It has been asking for cosmetic
>> surgery for some time now (rust repair and paint)!
>>
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