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1981 911 SC Emissions Tests

Engine

Vehicle Information: Model: 911SC; Year: 1981; Body Type: Targa; Total Mileage: 102,000;

Recently purchased a 1981 SC. When I took it to have the NY State emissions tests performed, it failed the Hydrocarbons (reading of 2.03 gpm vs. requirement of 0.80 gpm) and NOx (reading of 4.42 gpm vs. requirement of 2.00 gpm); CO was fine at less than half of the requirement. As I live in the NYC metro area, I was told there are more stringent requirements than the rest of NY. Has anyone else had trouble with the NY metro area test region? Any thoughts on what causes such high readings?

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