NOTE: Curb idle only test are for vehicles with full-time 4WD, non-defeatable traction control and motorcycles. Curb idle and loaded cruise tests are performed on 1967-80 light-duty gasoline powered vehicles and all heavy-duty gasoline powered vehicles.

ARIZONA EMISSION STANDARDS - PHOENIX AREA (CURB IDLE & LOADED CRUISE TESTS)

Application ⁽¹⁾

Idle HC ppm (CO %)

⁽²⁾ Loaded/Cruise HC ppm (CO %)

Light Duty Vehicles (6000 GVWR Or Less)

1967-71 4-Cyl. Or Less

500 (5.50)

500 (4.20)

1967-71 More Than 4-Cyl.

450 (5.00)

450 (3.75)

1972-74 4-Cyl. Or Less

400 (5.50)

400 (4.20)

1972-74 More Than 4-Cyl.

400 (5.00)

400 (3.75)

1975-78 4-Cyl. Or Less

250 (2.20)

250 (1.65)

1975-78 More Than 4-Cyl.

250 (2.00)

250 (1.50)

Light Duty Vehicles (8500 GVWR Or Less)

1979 4-Cyl. Or Less

220 (2.20)

220 (1.65)

1979 More Than 4-Cyl.

220 (2.20)

220 (1.50)

1980

220 (1.20)

1981 & Newer

220 (1.20)

.....

Light Duty Trucks (6000 GVWR Or Less)

1967-80

⁽³⁾

Light Duty Trucks (6001-8500 GVWR)

1967-74

⁽³⁾

1975-78

350 (4.00)

350 (3.00)

1979 4-Cyl. Or Less

220 (2.20)

220 (1.65)

1979 More Than 4-Cyl.

220 (2.00)

220 (1.50)

1980

220 (1.20)

1981 & Newer

220 (1.20)

.....

Heavy Duty Trucks (Greater Than 8500 GVWR)

1967-74

⁽³⁾

1975-78

350 (4.00)

350 (3.00)

1979 & Newer

300 (4.00)

300 (3.00)

Motorcycles

1967 & Newer

1800 (5.50)

.....

⁽¹⁾	4-stroke engines only.

⁽²⁾	Except AWD, non-defeatable traction control and motorcycles.

⁽³⁾	Same as light duty vehicles.

ARIZONA EMISSION STANDARDS - PHOENIX AREA (IM147 TEST)

Application	HC gpm (CO gpm)	NOx gpm
Light Duty Vehicles
1981-82	3.0 (25.0)	3.5
1983-85	2.4 (20.0)	3.5
1986-89	1.6 (15.0)	2.5
1990-93	1.0 (12.0)	2.5
1994 & Newer	0.8 (12.0)	2.0
Light Trucks (6000 GVWR Or Less)
1981-85	4.0 (40.0)	5.5
1986-89	3.0 (25.0)	4.5
1990-93	2.0 (20.0)	4.0
1994 & Newer	1.6 (20.0)	3.0
Light Duty Trucks (6000-8500 GVWR)
1981-85	4.4 (48.0)	7.0
1986-87	4.0 (40.0)	5.5
1988-89	3.0 (25.0)	5.5
1990-93	3.0 (25.0)	5.0
1994 & Newer	2.4 (25.0)	4.0

NOTE: Curb idle test only for 1967-80 light-duty gasoline vehicles, all vehicles with full-time 4WD and/or non-defeatable traction control and motorcycles. Curb idle and loaded cruise tests are performed on all 1981 and later vehicles except those with full-time 4WD and/or non-defeatable traction control.

ARIZONA EMISSION STANDARDS - TUCSON AREA (CURB IDLE & LOADED CRUISE TESTS)

Application ⁽¹⁾

Idle HC ppm (CO %)

⁽²⁾ Loaded/Cruise HC ppm (CO %)

Light Duty Vehicles (6000 GVWR Or Less)

1967-71 4-Cyl. Or Less

500 (5.50)

.....

1967-71 More Than 4-Cyl.

450 (5.00)

.....

1972-74 4-Cyl. Or Less

400 (5.50)

.....

1972-74 More Than 4-Cyl.

400 (5.00)

.....

1975-78 4-Cyl. Or Less

250 (2.20)

.....

1975-78 More Than 4-Cyl.

250 (2.00)

.....

Light Duty Vehicles (8500 GVWR Or Less)

1979 4-Cyl. Or Less

220 (2.20)

.....

1979 More Than 4-Cyl.

220 (2.20)

.....

1980

220 (1.20)

.....

1981 & Newer

220 (1.20)

Light Duty Trucks (6000 GVWR Or Less)

1967-80

⁽³⁾

Light Duty Trucks (6001-8500 GVWR)

1967-74

⁽³⁾

1975-78

350 (4.00)

.....

1979 4-Cyl. Or Less

220 (2.20)

.....

1979 More Than 4-Cyl.

220 (2.00)

.....

1980

220 (1.20)

.....

1981 & Newer

220 (1.20)

Heavy Duty Trucks (Greater Than 8500 GVWR)

1967-74

⁽³⁾

1975-78

350 (4.00)

.....

1979-80

300 (4.00)

.....

1981 & Newer

300 (4.00)

300 (3.00)

Motorcycles

1967 & Newer

1800 (5.50)

.....

⁽¹⁾	4-stroke engines only.

⁽²⁾	Except AWD, non-defeatable traction control and motorcycles.

⁽³⁾	Same as light duty vehicles.

Safety Warning

State Emission Standards - Gas: ARIZONA

Use the Manual With the Right Hardware

When to See a Mechanic

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