Date: Sat, 29 Dec 2012 03:20:09 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: O2 sensor type problem after replacing O2 sensor
In-Reply-To: <CAB2Rwfgjr7ZMN7tPPNpLJm7ccciZLJNNvBHVAwPPMGTwSR8rUg@mail.gmail.com>
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If the wire was only "shorted" you would not see a "high" volts reading from
the sensor. You can't get high voltage across a short especially with a
limited current supply. Now maybe you had a short and the ground connection
was poor/open at the other side. That would put the ECU into a how rich can
we get it mode.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
neil n
Sent: Friday, December 28, 2012 3:23 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: O2 sensor type problem after replacing O2 sensor
Here's some close up shots of the green coaxial O2 wire on my '88 2.1
I'm not certain it was causing an issue, but, it was pretty clear to me that
the slight bits of excess shield wire may have been shorting to the inner
"signal" wire.
3 images starting here:
https://picasaweb.google.com/musomuso/New1988Westy#5748856721901671282
I was able to repair this by cutting the wire back. I don't recall if I used
shrink wrap to help ensure longevity. I think wire movement is what kills it
over time.
Cutting into the loom can be a slightly hazardous (i.e. you cut another
wire) but is not rocket surgery. The connector(s) from the O2 should be long
enough to reach even if the green wire is shortened.
Good electrical tape is nice for loom repair.
Neil.
On Fri, Dec 28, 2012 at 10:39 AM, David Clarkson <dvdclarksn@aol.com> wrote:
> 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.
--
Neil n
65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
'88 Slate Blue Westy to be named.
'81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
Vanagon VAG Gas I4/VR Swap Google Group:
http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engine
s
