Everytime I go to my local Vietnamese Smog guy with my Subie 2.2 conversion, he always says the same thing:  Just sit there and let it idle and get good and hot.  (It was always recommended too with 1.9 WBX). And I pass every time.  California, San Diego.   Your specific issues about CO failure....I don't know...but Dennis H. will.  Seems like New York and California are aligning themselves smog wise.

    On Wednesday, May 31, 2023 at 04:38:43 PM PDT, Karl Ploessl <karl.ploessl@gmail.com> wrote:  
 
 I was driving about 10 miles to DMV and was waiting in line ~ 30 minutes
with engine idling.
-----

Karl '81 Westy "Jenny"

'91 Westy "Jenny 2" Wilmington, DE

On Wed, May 31, 2023 at 7:29 PM Eric Caron <ericcaron96@comcast.net> wrote:

> Wow!
>
> This will be an interesting conversation.
>
> Only thing I’ve heard of is it helps to get tested when engine is well
> heated up.  Also, basic tune up might help.  But, I look forward to better
> thoughts.
>
> Eric
>
>
> > On May 31, 2023, at 5:41 PM, Karl Ploessl <karl.ploessl@GMAIL.COM>
> wrote:
> >
> > here are the numbers:
> >
> > low high
> >
> > HC (ppm)
> >
> > readings 145 88
> >
> > limit 220 220
> >
> > result PASS PASS
> >
> >
> > CO (%)
> >
> > readings 3.39 2.48
> >
> > limit 1.20 1.20
> >
> > result FAIL FAIL
> >
> >
> > CO (%) + CO2 (%)
> >
> > readings7.49 13.24
> >
> >
> > RPM reading
> >
> > readings 935 2580
> >
> > limit 500 2200
> >
> > result PASS PASS
> >
> >
> > The alignments of the table is somewhat screwed up but it failed CO
> > emission at low and at high RPMs (935 and 2580). What would be the
> reason?
> >
> >
> > Karl '81 Westy "Jenny"
> >
> > '91 Westy "Jenny 2" Wilmington, DE
>
>