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Date:         Thu, 25 Jan 2001 23:35:59 -0500
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: VW cat converter : 2 or 3 way?
Comments: To: Gary McEachern <glmce@HOTMAIL.COM>
In-Reply-To:  <F143hKPc99ir3wSimD30000023b@hotmail.com>
Content-type: text/plain; charset=iso-8859-1

All Cats used with an O2 sensor are of the 3 way type. That is why the O2 sensor is needed.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf Of Gary McEachern Sent: Thursday, January 25, 2001 11:06 PM To: vanagon@GERRY.VANAGON.COM Subject: VW cat converter : 2 or 3 way?

Hello Volks I am trying to determine if the VW cat converter is a 2 way or a 3 way converter. The 3 way uses a Reduction Catalyst employing Platinum and Rhodiun to reduce NOx emissions in addion to the standard "2 way" Oxidization Catalyst which employs Platinum to reduce unburned HC and CO emissions. Modern converters I am told tend to be 3 way. I believe all converters have the Oxidization Catalyst to reduce HC and CO emissions.

My Subaru powered Weekender failed for high NOx emissions which means I need to use a 3 way converter that has the Reduction Catalyst. The converter on my present exhaust was apparently gutted by the previous owner.

Any information would be greatly appreciated.

Gary

Gary McEachern, Reading Ma. '90 Westy '87GL Wolfy Weekender SubaVanagon '75 Spitfire

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