Back in 2001 year, almost exactly two years ago, I posted my '91
        Carat's smog test results after it had a complete tune-up. I was
        a bit amazed at the results.

        Today it got its biennial emission test

        Interestingly the Carat 2 years later runs cleaner at 2500 and
        idles cleaner (lower HC) but emits more carbon monoxide at 2500
        but less at idle...possibly due to the bottle of Techron additive
        I put in at fill-up prior to the test?

         2500 rpm
                    MAX allowable    Average     Measured     Result
                                               '01   '03    '01  '03
         HC ppm        0180           0020      0024  0021   PASS PASS
         CO %          1.00           00.10     0.00  0.10   PASS PASS
         CO2                                    14.6  10.7
         O2                                      .2   .00
         RPM                                    2527  2649

        IDLE RPM
                    MAX allowable    Average    Measured      Result
                                                '01   '03    '01  '03
         HC ppm        0120           0030      0023  0017   PASS PASS
         CO %          1.00           00.10     0.03  0.00   PASS PASS
         CO2                                    14.3  9.00
         O2                                     0.00  0.00
         RPM                                    0890  0823

        NOTE:  O2 sensor has never been replaced
               Carat miles:  109K in 2001; 130K in 2003.

        Emissions testing has gone up $15-$20 with no discernable
        difference in the procedure for vehicles without an OBD-II.

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  You can't depend on your judgement when your imagination is out of focus.
                                                          -- Mark Twain.
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        OLTECO                    Ari Ollikainen
        P.O. BOX 20088            Networking Architecture & Technology
        Stanford, CA              Ari@OLTECO.com
        94309-0088                415.517.3519