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Date:         Sat, 27 Jan 2001 12:41:56 -0600
Reply-To:     Larry Alofs <lalofs@ENTERACT.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@ENTERACT.COM>
Subject:      Re: VW cat converter : 2 or 3 way?
Comments: To: Gary McEachern <glmce@HOTMAIL.COM>
Content-Type: text/plain; charset=us-ascii

Gary McEachern wrote:

> 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 > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com

It seems to me that high NOx can be caused by an engine running too lean, which may be caused by a malfunctioning O2 sensor-lambda control system or various vacuum leaks, etc. See the Bosch fuel injection manual.

Larry A.


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