Date: Sat, 1 Nov 2014 09:26:26 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Single wire Oxygen sensor: Substitution report..
In-Reply-To: <CAHTkEu+AT6NUUqH7iHu0HpkD79_fLSCYyWFT7wQZH4dhE8TG5Q@mail.gmail.com>
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For that tested used one you need to keep it clean. Dirt and oily stuff in most spare parts bins will foul them. Once used they do seem to go bad in storage. Since you're not running a catalyst you could figure a way to tune things so the O2 sensor is not needed.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Don Hanson
Sent: Friday, October 31, 2014 9:24 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Single wire Oxygen sensor: Substitution report..
OK Gang, Some more ....When I did, at first, connect up a Bosch single
wire O2 sensor I was not 100% certain of it, having had it in a baggie
under my bench now for a year or two. Everything ran great for a few
hundred miles then the O2 sensor symptoms came back...intermittent rich and over rich...
So I got another brand new one. I found the first one was very very loose...finger tight at best. It was not finding a good ground in the exhaust bung...
I then tested the two side by side (I think I found that link on my own
also) and both worked, so now I have a tested almost new one back in my spare parts bin...
On Fri, Oct 31, 2014 at 3:50 PM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> I use a flashlight type "C" or "D" cell.
>
> Dennis
>
> -----Original Message-----
> From: Craig C Forney [mailto:craig@opus.com]
> Sent: Friday, October 31, 2014 6:49 PM
> To: 'Dennis Haynes'; vanagon@GERRY.VANAGON.COM
> Subject: RE: Single wire Oxygen sensor: Substitution report..
>
> I am not sure if it would cause any damage to the ECU, but I would be
> wary of putting 12V on the oxygen sensor input to the ECU, as it is
> only expecting a low amperage signal between 0 and 1V.
>
> If 12V indeed has no bad effect on the ECU, and convinces the ECU that
> it is a fully rich condition, then I would agree that this would
> certainly would cause the engine to go lean.
>
> However, if you are just checking to make sure that there is
> continuity on the wires, grounding the input, causing the engine to
> run rich, would probably be sufficient.
>
> Craig in Cupertino
>
>
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> > Behalf Of Dennis Haynes
> > Sent: Friday, October 31, 2014 2:03 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Re: Single wire Oxygen sensor: Substitution report..
> >
> > The sensor does need a return path and it is done through the
> > exhaust and engine. There has to be a complete circuit. The ECU
> > sensor input can also be tested with a battery. Ground the input and
> > the engine should go rich, connect the battery positive terminal to
> > the lead and ground the negative and the engine should go lean.
> >
> > Dennis
> >
>
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