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State Emission Standards - Gas: ILLINOIS

ILLINOIS EMISSION STANDARDS - IM240 TEST

Application HC gpm CO gpm
Light Duty Vehicles (6000 GVWR Or Less)
1981-82 2.00 60.0
1983-87 2.00 30.0
1988-95 0.80 15.0
1996 & Newer 0.60 10.0
Light Duty Trucks (6000 GVWR Or Less)
1981-83 7.50 100.0
1984-87 3.20 80.0
1988-95 1.60 40.0
1996 & Newer (3750 LVW Or More) (1) 0.80 13.0
1996 & Newer (3750 LVW Or Less) (1) 0.60 10.0
Light Duty Trucks (6001-6500 GVWR)
1981-83 7.50 100.0
1984-87 3.20 80.0
1988-95 1.60 40.0
1996 & Newer (5750 ALVW Or More) 0.80 15.0
1996 & Newer (5750 ALVW Or Less) 0.80 13.0
(1) Loaded Vehicle Weight (LVW) is vehicle curb weight plus 300 lbs.
ILLINOIS EMISSION STANDARDS - IDLE TEST

Application HC ppm (CO %)
Passenger Vehicles (6000 GVWR Or Less)
1968-71 900 (9.0)
1972-74 800 (8.0)
1975-77 700 (7.0)
1978-79 600 (6.0)
1980 300 (3.0)
1981 & Newer 220 (1.2)
Light Duty Vehicles (8000 GVWR Or Less)
1968-71 900 (9.0)
1972-74 800 (8.0)
1975-78 700 (7.0)
1979-80 600 (6.0)
1981-83 300 (3.0)
1984 & Newer 220 (1.2)
Heavy Duty Vehicles (8001 GVWR Or More)
1968-71 1500 (9.5)
1972-78 900 (9.0)
1979-84 700 (7.0)
1985 & Newer 300 (3.0)