Or. Admin. Code § 340-256-0390 - Emission Control System Inspection: Heavy Duty Gasoline Motor Vehicle Emission Control Test Criteria

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)

(a) A vehicle emission control test is not valid if the gas cap or catalyst has been disconnected, plugged, or otherwise made inoperative in violation of ORS 815.305(1), except as noted in 815.305(2).

(b) DEQ may provide alternative criteria for those required under subsection (a) of this section if it determines that the component or an acceptable alternative is unavailable.

(c) The use of a non-original equipment aftermarket part (including a rebuilt part) as a replacement part is not a violation of ORS 815.305, if DEQ determines that such use will not adversely affect emission control efficiency.

(d) Adjustments or alterations of a particular part or system parameter, if done for purposes of maintenance or repair according to the vehicle or engine manufacturer's instructions, are not violations of ORS 815.305.

(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.]

Notes

Or. Admin. Code § 340-256-0390

DEQ 136, f. 6-10-77, ef. 7-1-77; DEQ 22-1979, f. & ef. 7-5-79; DEQ 12-1982, f. & ef. 7-21-82; DEQ 19-1983, f. 11-29-83, ef. 12-31-83; DEQ 6-1985, f. & ef. 5-1-85; DEQ 12-1985, f. & ef. 9-30-85; DEQ 21-1988, f. & cert. ef. 9-12-88; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 15-1994, f. 6-8-94, cert. ef. 7-1-94; DEQ 25-1996, f. & cert. ef. 11-26-96; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-024-0325; DEQ 7-2005, f. & cert. ef. 7-12-05; DEQ 167-2018, minor correction filed 04/12/2018, effective 04/12/2018; DEQ 21-2020, amend filed 11/19/2020, effective 11/19/2020

Statutory/Other Authority: ORS 468A.360

Statutes/Other Implemented: ORS 468A.350 - 468A.385