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carbon monoxide
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  1. Car Construction and Equipment
    I need to smog my street car (MkII GTI with a built 2.0L 16V) again sometime in the next week at a CA Test Only station. Last time my CO# was average, my HC# was significantly above average but still well within spec, but my NO# was very nearly a fail (1016 PPM meas vs 1021 PPM MAX). Last time...
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