Check in the archives for a message that posted to the list on 2/11/01. Has
info about some weak and failing connections in the wiring from the O2
sensor to the ECU.
Gary
----- Original Message -----
From: "Chad" <groch@WORLDCHAT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, March 05, 2001 2:27 PM
Subject: O2 Sensor Questions

> I've been experiencing some engine troubles over the past while with my
> 85GL. Upon acceleration my engine hesitates and stubles with no power.  I
> checked and cleaned the AFM, made sure there were no air leaks, replaced
air
> filter, and put in a new Temp II sensor. After all this it did idle better
> and run well. When it was causing all the problems it happened to be very
> wet outside, eiter wet snow or lots of rain. I assumed it must be an
> electrical connection somwhere. Well today the hesitation started again
> (crappy here today.....wet, snow etc.)  I immediatly pulled over and heard
> the engine stumble and run bady.  I then disconnected  the O2 sensor and
all
> is well again. Could it in fact be a screwed O2 sensor or the wire that
> connects it to the ECU????  I'm not sure of the age of the sensor.
> Also, upon pricing a new sensor I got some different results.  The dealer
> here (Ont Canada) wants $140 for a new one. The local autoparts store has
> one in stock for $50. It is not a Bosch but he says is made by Bosch under
> the name "Neumo" (or something like that).  The list vendors want ~$30US.
> What should I do.
> Lastly, is it bad to be driving the van with the O2 sensor
disconnected????
> thanks,
> Chad
>