so glad to see you say this, and this is partly why I don't recommend
'replacing parts' as a trouble shooting method.

----- Original Message -----
From: "Mike Collum" <collum@VERIZON.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, September 11, 2008 2:49 PM
Subject: Re: Question about temp II sensor and bad running

> FWIW, I once replaced an O2 sensor just because it was time and I was
> putting a new exhaust system on anyway.  The engine was running fine.
>
> After putting in the new stuff I went for a ride.  The engine ran badly
> especially at highway speeds.  I disconnected the O2 sensor and it ran
> well with it disconnected.  It turns out I got a bad sensor right out of
> the box.  After putting on yet another new sensor all was well.  I tried
> the (used once) sensor on another Vanagon and it caused that engine to
> run badly, too.  Not all that is new is good.
>
> Mike
> Houlton, Maine/Glade Spring, Virginia