I took my 1993 190E 2.6 to a Gold Shield Station as per my registration renewal form today and could use a little bit of help with the test results.

15 mph @ 1754 rpm- co2 14.9, o2 0.00, HC (PPM) max 86, Avg. 21 Meas 97, CO% 0.5 max, 0.06 avg, 0.06 Meas, NO (PPM) 697 max, 150 avg, 150 Meas. FAILED (HC)

25 mph @ 1725 rpm- co2 14.9, o2 0.00, HC (PPM) max 51, Avg. 13 Meas 51, CO% 0.48max, 0.06 avg, 0.02 Meas, NO (PPM) 724 max, 136 avg, 83 Meas. PASSED (but barely on the HC) .

Before the test I had changed the plugs (Bosch non-resistor H9DCO) and air filter , the has had an oil and filter change within 1000 miles. Prior to arriving at the test station, I took it on a drive and the freeway about 20 minutes and 25 minutes back down, the car was running about 82 degrees on the temp gauge.

I've never had a car fail smog before and wonder if there is anything else I should have done, or can do before my free re-test.

Thanks in advance.
David

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1993 190E 2.6 135k
1989 Ford Thunderbird SC 5 Spd 79K