Date:         Tue, 31 Oct 2000 20:17:26 -0500
Reply-To:     Joe Romas <jromas@COLUMBUS.RR.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Joe Romas <jromas@COLUMBUS.RR.COM>
Subject:      Re: O2 Sensors need grounding? (was STILL BUCKING & KICKING!!!)
Comments: To: David Beierl <dbeierl@ATTGLOBAL.NET>
Content-Type: text/plain; charset="iso-8859-1"

While trouble shooting mine I got so desperate I put a booster cable on it
and grounded it to the grounding point on the left head. Turned out to be
the AFM. To test it, meter between pins 15 & 19 of ecm plug, look for smooth
rise in resistance as you move the wiper thing from rest to full open. Don't
push the arm, use the finger on the opposite side. You might see it jump
wildly at a certain point and then settle back down. That's your bucking. My
84 started at about 500 ohms at rest. I cleaned mine 3 times before I
checked it this way and then cleaned it real good, now it runs perfectly.

Joe

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, August 14, 2000 5:55 AM
Subject: Re: O2 Sensors need grounding? (was STILL BUCKING & KICKING!!!)


> At 12:38 8/13/2000, Gary Stearns wrote:
> >Do oxygen sensors require grounding through the exhaust system?
>
> Yes
>
> >  Could this
> >be why exhaust work would mysteriously cure b&k?
>
> Yes, ie yes could be, not yes is.
>
> >   Could the anti-seize goop
> >I put on the threads (only on the threads, not on the sensor)  be
isolating
> >my sensor?  Just curious.
>
> It's quite possible that the antiseize poisoned your sensor and ruined
> it.  I did it to one of Jon Casey's a month ago by being thoughtless --
the
> sensors come with a dab of "safe" antiseize already applied to the
> threads.  This was a reinstall and I don't know what/where to get stuff
> that's safe -- it may even be that they simply are very careful where it's
> applied, though I doubt it.  Anyway, Jon's lasted about five or maybe ten
> minutes before it was toast.
>
> I doubt that it would interfere with the connection though, if the sensor
> were tightened reasonably.
>
> david
> David Beierl - Providence, RI
>   http://pws.prserv.net/synergy/Vanagon/
> '84 Westy "Dutiful Passage"
> '85 GL "Poor Relation"
>