When the 02 sensor went bad these were My symptoms  major
hesitation and surging only after normal operating tem.     Marcus

John Robson wrote:

>      Until recently I have always heard that the O2 sensor doesn't make any
>      difference.  Now my light is on and the van continues to drive fine.
>      Is it worth replacing it?
>
> ______________________________ Reply Separator _________________________________
> Subject: Re: Vanagon O2 Sensors
> Author:  Yi-Ruey Wei <ray.wei@US.PWCGLOBAL.COM> at Internet
> Date:    7/15/98 11:47 AM
>
> Good news!  You can get a stock Bosch O2 sensor at German Parts &
> Restoration (1-800-321-5432) for $118 + shipping.   Just talk to Greg at
> ext. 504.  The O2 sensor I've bought from them has Bosch no. 0 258 003 931
> but the sensor from VW dealer has Bosch no. 0 258 003 031.
>
> Yi-Ruey Wei
> 87 Vanagon GL Syncro w/leaking cylinder head
> 85 Jetta GLI w/160,000 miles
> Dallas
> ray.wei@us.pwcglobal.com
>
> Michael Sullivan <sullivan@OPENMARKET.COM> on 07/14/98 06:50:39 AM
>
> Please respond to Michael Sullivan <sullivan@OPENMARKET.COM>
> To:   Vanagon@VANAGON.COM
> cc:
> Subject:  Re: More 91 syncro troubleshoot ?'s
>
>   ------------------------------------------------------------------------
>
> Dear Nathaniel,
>
> This is precisely the same thing that happened to me just two weeks ago --
> I properly installed a "generic" O2 sensor and the engine wouldn't run at
> all once it warmed up. Disconnected ran fine. Bought a "stock" O2 sensor,
> plugged it in and all was well again.
>
> So moral of the story? Either the generic O2 sensor I was sold was bad
> (which I suspect) or the splice that I made was bad (unlkely, as I've done
> WAY too many automotive splices in my day).
>
> Here's to $130 O2 sensors!
> MJS
>
> At 08:18 AM 7/13/98 -0700, Nathaniel Merrill wrote:
> >I ran some more tests.  As far as I can tell the sensor is the correct
> one.  It also looks identical to the old one.  The splice  I made was 6
> inches from the sensor and are OK.  SO I did not mess with the green
> possibly coaxial cable up on the other side of the connector and the three
> wires to the sensor  are not coaxial.   None of the pins on the two
> connecters show continuity with ground or the sensor housing.  Only the two
> white wires are continuous with each other and the black is not continuous
> with anything.  Is this correct?  As I understand it the two white wires
> are for the sensor heater.  I would expect them to be continuous if this
> was true (but, my old sensor does not show continuity though the two white
> wires-maybe the heating element was burnt?)  I also tried what was
> suggested- run the van with the O2 unplugged and check for voltage.  With
> the engine at normal op temp there was no voltage between the black wire
> and ground (using a multi meter).  Is this the way to test this?  Any more
> help is appreciated!
> >
> >>>> Gerald Skerbitz <gsker@x139-110.med.umn.edu> 07/12 7:26 AM >>>
> >The green wire which runs to the O2 sensor is a coax wire.  The outer wire
> is
> >a shield of some sort which goes to ground. Make SURE you haven't
> connected it
> >to the O2 signal wires.
> >
> >On Sat, 11 Jul 1998, Nathaniel Merrill wrote:
> >
> >> There recently was a thread regarding poor running of a Vanagon after a
> tune up.  I read the conclusions and don't think it covers my problem
> although It is related...
> >> I just installed a new O2 sensor.  It was a Bosch which needed to be
> spliced in.  I know how to solder and made some fine connections which were
> covered with shrink wrap afterwards.  Anyway,  it's now running really
> crappy...Smoke, black tail pipe, sounds like it's missing....the works.  It
> did run fine before the switch AND I unplugged the O2 sensor and went for a
> test and it ....dare I say, ran great.   Whats Up?
> >>
> >
> >--
> >Gerry
> >Gerald Skerbitz <g-sker@umn.edu>
> >U of MN Academic Health Center Administrative Information Systems  6-5379
> >Home St. Paul,Ramsey County,Minnesota, USA
> >
> Michael J. Sullivan
> Director of Catalog Design
> Open Market, Inc.
>
> '87 GL Syncro Westfalia
> ********************************************
> work:      http://www.openmarket.com
> vanagon:   http://www.hsdesign.com/vanagon
> scan tips: http://www.hsdesign.com/scanning
> ********************************************
>
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> Reply-To: ray.wei@US.PWCGLOBAL.COM
> Sender: Vanagon Mailing List <Vanagon@VANAGON.COM>
> From: Yi-Ruey Wei <ray.wei@US.PWCGLOBAL.COM>
> Subject:      Re: Vanagon O2 Sensors
> Comments: To: Vanagon@VANAGON.COM
> To: Vanagon@VANAGON.COM