Date: Fri, 28 Dec 2012 13:39:13 -0500
Reply-To: David Clarkson <dvdclarksn@AOL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Clarkson <dvdclarksn@AOL.COM>
Subject: O2 sensor type problem after replacing O2 sensor
Content-Type: text/plain; charset="us-ascii"; format=flowed
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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