WAC 173-422-060   Gasoline vehicle emission standards.  Gasoline motor vehicles subject to this chapter shall:

     (1) When tested using the exhaust emission testing procedures described in (II) Two Speed Idle Test of Appendix B Test Procedures of Subpart S-Inspection/Maintenance Program Requirements of Part 51 of Chapter 1, Title 40 of the Code of Federal Regulations adopted November 1, 1992, meet the applicable exhaust emission standards from the following table during both the idle and higher speed mode.

Two Speed Idle Test Exhaust Emission Standards
Model Year CO(%)* HC (ppm)*
80 and earlier 3.0 600
81 and newer (0-8500 GVWR) 1.2 220
81 and newer (Greater

than 8500 GVWR)		 3.0 400
* Carbon monoxide (CO) and hydrocarbons (HC), measured as a percentage (%) or parts per million (ppm) of the exhaust volume.

     (2) When tested using the acceleration simulation mode (ASM) procedure specified in WAC 173-422-070 meet the following standards during that mode and the applicable standard from WAC 173-422-060(1) during the idle mode.


ASM Mode Exhaust Emission Standards



Model Year Test

Weight (lbs.)		 CO(%)*   HC(ppm)

1980 and earlier model year cars and trucks (0-8500 lbs. GVWR)
1750 4.2 400
1875 4.0 380
2000 3.8 350
2125 3.6 340
2250 3.4 320
2375 3.2 300
2500 3.0 290
2625 2.9 270
2750 2.8 260
2875 2.7 250
3000 2.6 240
3125 2.5 230
3250 2.4 220
3375 2.3 220
3500 2.2 210
3625 2.1 200
cars 3750 & greater 2.1 200
trucks 3750 & greater 2.5 300

1981 & later model year cars and trucks (0-8500 lbs. GVWR)
1750 1.8 250  
1875 1.7 240  
2000 1.6 220  
2125 1.5 210  
2250 1.5 200  
2375 1.4 190  
2500 1.3 180  
2625 1.3 180  
2750 1.2 170  
2875 1.2 160  
3000 1.1 160  
3125 1.1 150  
3250 1.0 150  
3375 1.0 150  
3500 1.0 150  
3625 1.0 150  
cars 3750 & greater 1.0 150  
trucks 3750 & greater 1.5 200  
* Carbon monoxide (CO) and hydrocarbons (HC), measured as a percentage (%) or parts per million (ppm) of the exhaust volume.

     (3) The gasoline filler cap must not leak more than 60 cubic centimeters per minute at a pressure of 30 inches of water.

     (4) Standardized on-board diagnostic (OBD) systems (also known as OBDII) were required by Environmental Protection Agency starting with 1996 model gasoline vehicle cars and light trucks. If a 1996 or newer model vehicle is equipped with an Environmental Protection Agency certified on-board diagnostic (OBD) system, the information stored in the on-board computer must indicate that all emission-related functional checks have been completed except for 1996 to 2000 model year vehicles that can have up to two readiness monitors not set to ready, or 2001 or newer model year vehicles that have one readiness monitor not set to ready, and no malfunctions detected that would command the malfunction indicator light to be illuminated.



[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04), § 173-422-060, filed 6/3/02, effective 7/4/02. Statutory Authority: Chapter 70.120 RCW. 96-21-029 (Order 95-11), § 173-422-060, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-35), § 173-422-060, filed 2/28/95, effective 3/31/95; 93-10-062 (Order 91-46), § 173-422-060, filed 5/3/93, effective 6/3/93; 90-06-062, § 173-422-060, filed 3/6/90, effective 4/6/90. Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and 70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-060, filed 11/23/83, effective 1/2/84. Statutory Authority: RCW 70.120.120. 82-02-027 (Order DE 81-32), § 173-422-060, filed 12/31/81; 80-03-070 (Order DE 79-35), § 173-422-060, filed 2/28/80.]