Date:         Mon, 20 Oct 2003 15:24:05 -0500
Reply-To:     Max Wellhouse <maxjoyce@IPA.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Max Wellhouse <maxjoyce@IPA.NET>
Subject:      Generic Wiring of Bosch O2 Sensor/ Cat implode
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Been a while since  I posted anything(life is great when the GL doesn't
require any work).  As a precautionary measure, i am replacing the O2
sensor on my HalTech ECU.  it came from AUS with an AC brand O2 sensor and
the local Advance Auto parts guy cross referenced a Bosch  unit to
comply.  the problem is that the AC model(AFS-75) has a male 3 prong end
and 4 wires to it and the Bosch(#15703) has a 4 prong female.  Going from
the Haltech wiring diagram, they have a wire carrying the 13.8v, a ground,
and the O2 sensor wire.  The new Bosch has two white wires, a black and A
GRAY.  If I  went strictly by the Pin A/Pin B/PinC set up, I believe I
would have some wires mismatching.  Does anyone  know if Bosch is
consistent with which color wire does the various functions of the
O2?  ie.  whites being the O2 wires/ black being ground/ Gray being the
13.8v wire?   Or some other combination?  Since this is pretty much a
specific issue, it's okay to p mail and save the rest of the listees the
mail box stuffing.  Thanks in advance.

On another note, I never realized what a clogged catalytic converter could
do to engine performance.  Was lucky to cripple home from the Quad Cities
yesterday.  the clue was some white junk that had dripped out of the
tailpipe overnight and the folks we were staying with pointed out that
possibility.  Low rpm performance towards the end of the 170 mile trip was
almost nil.  Should have it on the road as soon as I figure ouot this O2
wiring issue.


DM&FS   90GL