Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 256 - MOTOR VEHICLES
Section 340-256-0390 - Emission Control System Inspection: Heavy Duty Gasoline Motor Vehicle Emission Control Test Criteria
Current through Register Vol. 63, No. 3, March 1, 2024
This rule documents the heavy duty gasoline motor vehicle emission test criteria.
(1) A vehicle emission control test is not valid if the vehicle exhaust system leaks in such a manner as to dilute the exhaust emissions being sampled by the gas analytical system. For the purpose of emission control tests conducted at state facilities, tests will not be considered valid if the exhaust emissions are diluted to such an extent that the sum of the CO and CO2 concentrations recorded for the idle speed reading from an exhaust outlet is six percent or less.
(2) A vehicle emission control test is not valid if the engine idle speed exceeds 1300 RPM.
(3)
(4) A 1981 or newer model motor vehicle that has been converted to operate on gaseous fuels is in violation of ORS 815.305 if elements of the factory-installed motor vehicle air pollution control system are disconnected for the purpose of conversion to gaseous fuel as authorized by 815.305.
[NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.]
Statutory/Other Authority: ORS 468A.360
Statutes/Other Implemented: ORS 468A.350 - 468A.385