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
>
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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.