The emissions inspection procedure shall
be a two-speed idle test as specified in section (II) of Appendix B of 40 CFR
, Subpart S.
1. The two-speed idle
test shall consist of a test of the vehicle's exhaust emissions at idle and at
2500 rpm while the vehicle's gear selector is in neutral or park.
2. The idle test shall be administered after
the 2500 rpm test. The tests shall be run consecutively.
3. The complete test shall consist of a first
chance 2500 RPM mode test; followed by a first chance idle mode test. If either
first chance mode fails, the first chance shall be followed by a
preconditioning at 2500 RPM for up to three minutes and a second chance 2500
RPM mode test followed by a second chance idle mode. The department may
eliminate the need to repeat a mode that passed the first chance
4. If the vehicle fails the
first chance test, the second chance test and preconditioning shall be omitted
if no exhaust hydrocarbon concentration less than 1800 ppm is detected within
an elapsed time of 30 seconds. The department may eliminate the need to do a
second chance test if the vehicle has already failed an emissions component
5. Motor vehicle
manufacturers and the Environmental Protection Agency may issue special test
instructions for specific vehicle models which shall be followed in lieu of the
test procedures specified in this section if such instructions are provided
through the administrator.
order to pass the two-speed idle test, the vehicle's exhaust shall not exceed
the standards listed in
7. Vehicles which are required to receive OBD
testing shall be connected to the appropriate test equipment according to
vehicle and analyzer manufacturer instructions. The OBD test shall be performed
prior to the two-speed idle test.
The idle test mode shall be performed as
1. The vehicle transmission shall be
in neutral or park and the parking brake applied; the engine shall be operating
at curb idle and there shall not be any manipulation of the engine throttle
2. The engine speed
(RPM) shall be obtained and shall be between 400 and 1250 RPM for the duration
of the test mode.
3. The pass/fail
analysis shall begin after an elapsed time of 10 seconds.
4. The idle mode elapsed time shall be 30
5. The exhaust
concentrations shall be measured as percent carbon monoxide and parts per
million hydrocarbons after stabilized readings are obtained and averaged over
the last five seconds at the end of the idle test mode.
The 2500 RPM test mode shall be performed
1. The vehicle transmission shall
be in neutral or park.
vehicle engine speed shall be increased from idle to between 2200 and 2800 RPM
and maintained at that level.
the engine speed varies outside the parameters of 2200 to 2800 RPM for more
than two seconds during a sampling period, the 2500 RPM mode shall be invalid
and the 2500 RPM test shall be restarted. If the engine speed varies outside
such parameters for more than a cumulative total of 10 seconds, the 2500 RPM
test mode shall be invalid and another initiated.
4. The pass/fail analysis shall begin after
an elapsed time of 10 seconds.
The 2500 RPM mode elapsed time shall be 30 seconds.
6. The exhaust concentrations shall be
measured as percent carbon monoxide and parts per million hydrocarbons after
stabilized readings are obtained and averaged over the last five seconds at the
end of the 2500 RPM test mode.
9 Va. Admin. Code § 5-91-440
Derived from Virginia
Register Volume 13, Issue 5, eff. January 24, 1997; amended, Virginia Register
Volume 18, Issue 20, eff. October 1, 2002; Volume 29, Issue 24, eff. August 28,
Register Volume 35, Issue 05, eff.
Statutory Authority: §
of the Code of Virginia; § 182 of the Clear Air Act; 40 CFR Part 51,