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Failed smog

Fuel System

Model: 944, Year:1984, Mileage:160983, Type of use:Street use only
I own a 1984 porsche...which recently ( 01-16-14) failed smog. It failed at the HC (PPM) at 15 and 25 mph. At 15 MAX 110...GP 311...MEAS 169. At 25 MAX 77...GP 261...MEAS 92...It also failed at the CO (%) at 15mph MAX 0.58...GP 2.33... MEAS 3.55 At 25mph MAX 0.44...GP 2.13 MEAS 0.93. At 15mph result GP...Gross Polluter and 25mph failed...my question to you... where would I begin to check or look for to get the gas down to its proper reading? The air flow meter, fuel sensor, DME or could it be a simple adjustment...your response would be greatly appreciated. (By the way it idles at 1100rpm)

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