67 Pa. Code § 177.201 - General requirements
I/M emission tests, OBD-I/M checks, evaporative system function tests, gas cap tests and visual inspections shall be subject to the following requirements:
(1)
Vehicles shall be tested in as-received condition. A vehicle capable of
operating on gasoline and other fuel is subject to testing and shall be tested
while operating in the gasoline mode.
(2) An initial test is the emission test that
occurs the first time in a test cycle. The initial test shall be performed
without prior repair or adjustment to the subject vehicle at the emission
inspection station, except as provided for in the evaporative system integrity
test. An emission inspection performed after the initial test in a test cycle
shall be considered a retest.
(3)
An official test, once initiated, shall be performed in its entirety regardless
of immediate outcome except in the case of an invalid test condition, unsafe
conditions or fast pass/fail algorithms.
(4) Tests involving measurements shall be
performed with approved equipment that has been calibrated according to the
quality control procedures contained in 40 CFR Part 51 , Subpart S, Appendix A
(relating to calibrations, adjustments and quality control), which is adopted
by reference, or as specified in Appendix A (relating to acceleration
simulation mode: Pennsylvania procedures, standards, equipment specifications
and quality control requirements).
(5) Vehicles may not be tested if the exhaust
system is missing or leaking, or if the vehicle is in an unsafe
condition.
(6) Alteration of a
vehicle's configuration so that it changes from a certified to a noncertified
configuration is prohibited. In the inspection process, vehicles that have been
altered from their original certified configuration shall be tested in the same
manner as other subject vehicles, in accordance with the following:
(i) Vehicles with engines other than the
engine originally installed by the manufacturer, or an identical replacement
engine shall be subject to the test procedures and standards for the chassis
type and model year, including visual equipment inspections for components that
are part of the original certified configuration and part of the normal
inspection.
(ii) Vehicles that have
been altered from an engine of one fuel type to another fuel type that is
subject to the I/M program, for example, from a diesel engine to a gasoline
engine shall be subject to the test procedures and standards for the current
fuel type, and to the requirements of subparagraph (i).
(iii) Vehicles that are altered to a fuel
type for which there is no certified configuration shall be tested according to
the most stringent emission standards established for that vehicle type and
model year. Emission control device requirements may be waived if the
Department determines that the alternatively fueled vehicle configuration would
meet the new vehicle standards for that model year without these
devices.
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