Hey all,
   Had my van smogged the other day and it failed on the treadmill test.
Here ara the results:

                            HC                      CO
   NOx
State standard     2.20gpm          60.00 gpm                   2.80 gpm

Inspection          1.374 gpm        15.306 gpm                3.616gpm
readings
FAILED

My van is powered by a 2 liter audi 3A inline 4 running on vw golf digifant
fuel injection from an RV engine code 1.8 l engine . It is using the stock
vanagon catalytic converter. The air claener and intake are stock 2.1 wbx
with the stock cold air inlet.The fuel pressure is 36psi idle and 42psi
under load. It has a new Oxygen sensor , plugs and wires. I get 24 mpg on
the road
and the engine is smooth running. It does however have what feels light a
lean stumble at throttle tip in. Idle speed and timming are set to stock RV
engine specs. I am wondering if it might be running too lean causing the NOx
to be high. If so would raising the fuel pressure be of any use. Also I seem
to remember there being a fuel additive designed to reduce emissions to get
you throuh the test.
Tanks in advance for any help I can get.
Dennis

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