Darrell,
    Thank you for the information in the O2 sensor.  I'm curious though,
mine ( 1985 Vanagon GL 1.9 WBX ) the O2 sensor just has one wire... and I
guess it plugs into that green wire that comes out of the harness..?  I have
had to completely change harness, electronics, and engine.  To explain why I
and not sure about where it goes..?

    How can one wire O2 sensor work if it heats up...?  The Bentley seems to
show a three wire O2 sensor, as does, our previous car, a Ford product.
Constructive criticism is appreciated.. I'm trying to learn..!.  How does a
one wire sensor work... ?

Also a note here, I would like to get my hands on VW fuel injection fuel
pumps that have been replaced..I'd be glad to pay postage.  I would like to
try my hand at rebuilding them.?  Sorry to change topic at the last.

Lyle Lathem
1985 Vanagon GL
Quinlan, TX