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Date:   Thu, 9 Sep 2004 11:49:29 -0700
Reply-To:   Tom Young <tomyoung1@COMCAST.NET>
Sender:   Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:   Tom Young <tomyoung1@COMCAST.NET>
Subject:   Re: Do I need a HEATED O2 sensor?
Comments:   To: Craig Oda <craigoda@gmail.com>
Content-Type:   text/plain; charset="iso-8859-1"

----- Original Message ----- From: "Craig Oda" <craigoda@gmail.com> To: "Tom Young" <tomyoung1@comcast.net> Cc: "vanagon" <vanagon@gerry.vanagon.com> Sent: Thursday, September 09, 2004 10:52 AM Subject: Re: Re: [VANAGON] Do I need a HEATED O2 sensor?

> As far as the original question concerning a single-wire O2 sensor. > This is what I have on my '83 waterboxer. I don't think that heating > the sensor with the third wire would affect emissions since the O2 > sensor is supposed to get to operating temp in under 2 minutes.

I'm not trying to affect the emissions, since the Federal air-cooled vehicles had no O2 sensor in the first place. All I'm trying to do is get a proper signal from the O2 sensor so I can use that to adjust the basic air/fuel mixture. IF my problem is that the sensor isn't getting hot enough because it's not buried deep in the exhaust (since I used a sparkplug anti-fouler instead of an O2 sensor bung) THEN I'm guessing the use of a heated sensor might overcome that problem.

> Tom, good luck and let us know if you pass emissions. BTW, are you > taking the van to a test-only center? Was it designated a > gross-polluter after the initial testing, or did it just fall > marginally out of spec?

I was forced to take it to a test-only center. I picked the place based on a local VW mechanic's recommendation because "the guy that runs the place knows VW's." When I noticed that 3 of the guys at the center were peering deep into the engine compartment, consulting manuals, etc. I wandered over and asked if I could help them find anything. Turns out they couldn't locate the EGR valve! So much for that.

It was marginally outside of spec on HC's at speed (OK idle) and a gross polluter for CO at both points.

--------------------------------------------------------------- Tom Young '81 Vanagon Lafayette, CA 94549 '82 Westfalia ---------------------------------------------------------------


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