914 Exhaust Emissions Specifications				Reference source
Model	Idle speed RPM	CO% vol. max.	Regulatory Body and Testing Conditions	Emission label	S&T Manual	Factory Repair Manual
1971 1.7L	800-950	4.5%	EPA and California standard	X
1972 1.7L	850-900	4.0%	EPA and California standard	X
	850-900	0.7%	Factory specification		X	X
1973 1.7L	800-950	3.0%	EPA and California standard	X		X
1973 2.0L	850-950	1.5%	EPA and California standard, Factory specification	X	X	X
1974 1.8L	800-900	4.5%	EPA and California standard	X
	800-900	3.0%	Factory specification		X
1974 2.0L	850-950	3.0%	EPA and California standard	X		X
1975 1.8L	850-950	3.0%	USA standard and Factory specification		X
	800-900	0.8%	California standard and Factory specification, measured before catalytic converter			X
	800-900	0.4%	California standard and Factory specification, measured after catalytic converter			X
1975 2.0L	850-950	1.0%	USA standard and Factory specification (with air injection, without catalytic converter), CO 3% max measured at tailpipe with disconnected air pump hose, CO 1% max measured at tailpipe with air pump hose connected		X
	850-950	0.4%	Factory specification, CO measured after catalytic converter			X
	850-950	0.0%	California standard and Factory specification (with air injection and catalytic converter), CO 1-5% max measured before catalytic converter with air pump hose disconnected, CO 0% measured after catalytic converter with air pump hose connected		X
1976 2.0L	850-950	3.0%	EPA and California standard (with EGR, air injection and catalytic converter), CO measured before catalytic converter with disconnected air pump hose, PCV hose and carbon canister	X		X
	850-950	0.4%	Factory specification, CO measured after catalytic converter			X
Notes:
1. Ignore the windshield emission label values. These are apparently a required label indicating factory compliance testing averages of the vehicle design which reference different measurements (grams per mile) than are useful today.

914 Emission control systems
	Equipment	Pollutant reduction	1970	1971	1971	1972	1972	1973	1973	1973	1973