The catalytic converter, proper ignition timing and a working O2 sensor are
the only devices the Vanagon had for NOx reduction. Most other vehicles use
EGR. Replace the Cat.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David M
Sent: Tuesday, June 16, 2009 4:03 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Emissions failure Nox

My 1987 Wolfsburg 2.1L automatic just failed the AZ emissions test for the
first time. It failed on Nitrogen Oxide which was twice the limit (5.65
grams/mile compared to 2.5 max limit). It passed on hydrocarbons and carbon
monoxide by a wide margin. There is only one VW specialist in the Phoenix
area that I know of 'Karls Kustom' in Mesa. I called them and the first
words out of their mouth were 'it probably needs a new catalytic converter'.
I do know the van has had little or no maintenance during the last 8 years,
prior to which the engine and trans were completely rebuilt. I drive it
probably less than 2000 miles a year. I'm under time pressure because the
registration expires at the end of the month and it cannot be registered
until it passes emissions. Any advice appreciated.

-David (Tempe, AZ)