11 CSR 50-2.280 - Air Pollution Control Devices
(1) The
inspection of air pollution control devices installed by the manufacturer will
apply to 1968 and later model vehicles. This does not apply to diesel fuel
vehicles or to vehicles operating exclusively on propane fuel or compressed
gas. Vehicles converted with option to operate on compressed natural gas or
propane are permitted to remove or modify the thermostatic air cleaner if the
modifications performed meet United States Environmental Protection Agency
Mobile Source Enforcement Memorandum Number 1A.
(A) Effective July 1, 1992, all light-duty
vehicles which are passenger vehicles with a Gross Vehicle Weight Rating (GVWR)
below six thousand pounds (6,000 lbs.) and commercial vehicles with a GVWR
below eight thousand five hundred pounds (8,500 lbs.), which receive a
replacement engine, in regard to all emissions related parts, engine design
parameters and engine calibrations, must comply with the certified
configuration of the same or newer model year as the vehicle chassis.
(B) Effective July 1, 1992, diesel powered
vehicles may receive a replacement gasoline engine if the resulting
engine-chassis configuration is equivalent to a certified configuration of the
same model year or newer as the chassis and that chassis has been certified
with a gasoline engine.
(C)
Effective July 1, 1992, heavy-duty vehicles which are passenger vehicles with a
GVWR in excess of six thousand pounds (6,000 lbs.) and commercial vehicles with
a GVWR in excess of eight thousand five hundred pounds (8,500 lbs.) may receive
a replacement heavy-duty engine if the resulting vehicle is identical to a
certified configuration of the same model year or newer. Under no circumstances
may a heavy-duty engine ever be installed in a light-duty vehicle.
(D) All 1968 and later model vehicles which
received a replacement engine before July 1, 1992, must be equipped with all
the air pollution control devices installed by the manufacturer on that
particular engine.
(E) Reject
vehicle if a:
1. Replacement engine is not
equivalent to the certified configuration of the enginechassis; or
2. Heavy-duty engine is used in a light-duty
chassis.
(2)
Crankcase Ventilation.
(A) The ventilation
system of the crankcase is commonly known as the positive crankcase ventilation
(PCV) system. The engine should be warm and running at idle during inspection
of the vent system.
(B) Inspect
plumbing connections for tightness and proper routing. Disconnect PCV valve
from engine. Shake briskly and listen for a rattling sound. Place finger or
thumb over end of valve and feel for vacuum suction.
(C) Reject vehicle if:
1. Plumbing is loose, broken, leaking or
improperly routed;
2. No vacuum
suction is present or valve does not rattle when shaken; or
3. Any part of the system is missing or
disconnected.
(3) Air Injection System.
(A) The air injection system provides air to
the exhaust manifold or catalytic converter. The system may or may not be
equipped with an external air pump.
(B) With engine stopped, inspect tension of
air pump drive belt. Inspect hose connections at air pump, antibackfire valve,
check valves and air distribution manifolds.
(C) Reject vehicle if:
1. Belt slips or is frayed, if serpentine air
pump belt has sections missing, if connections are loose, broken or leaking;
or
2. Any part of the injection
system is missing or disconnected.
(4) Engine Modification Type.
(A) An engine modification control system may
be most easily identified as one without an air pump.
(B) With engine stopped, inspect ignition
wiring and vacuum hose connections.
(C) Reject vehicle if:
1. Wires or connections are loose, broken or
leaking; or
2. Any part of system
is missing.
(5)
Thermostatic Air Cleaner.
(A) The
thermostatic air cleaner provides heated air to the carburetor during
cold-engine operation.
(B) Inspect
exhaust manifold shroud, preheat tube, vacuum diaphragm air cleaner and vacuum
hoses.
(C) Reject vehicle if:
1. Connections are broken or disconnected;
or
2. Any part of system is
missing.
(6)
Spark Control System.
(A) The spark control
system controls the advance and retard of the ignition spark.
(B) Inspect distributor, vacuum control
valve, electrical control switch, wiring and vacuum hoses.
(C) Reject vehicle if:
1. Wiring or vacuum lines are broken, leaking
or improperly routed; or
2. Any
part of the system is missing or bypassed.
(7) Exhaust Gas Recirculation.
(A) The exhaust gas recirculation system
supplies metered exhaust gas to the intake manifold.
(B) Inspect exhaust gas recirculation valve,
temperature control valve and vacuum lines for proper routing.
(C) Reject vehicle if:
1. Components are broken, leaking or
improperly routed; or
2. Any part
of system is missing.
(8) Oxygen Sensor System.
(A) The oxygen sensor system measures the
quantity of oxygen present in the exhaust system and supplies a signal to the
carburetor or fuel injection system.
(B) Inspect oxygen sensor, located in exhaust
manifold, temperature sensor, crankshaft sensor, microprocessor and wiring for
proper routing.
(C) Reject vehicle
if any:
1. Component is leaking, bypassed,
modified or disconnected; or
2.
Part of the system is missing.
(9) Evaporative Emission System.
(A) The evaporative emission system restricts
the release of fuel vapors by storing and metering the fuel vapors into the
fuel intake system.
(B) Inspect the
fuel tank vent line, overfill limiting valve, charcoal canister and purge line
for proper mounting, leaks and proper routing.
(C) Reject vehicle if:
1. Components are leaking, improperly routed
or mounted; or
2. Any part of the
system is missing or disconnected.
(10) Catalytic Converters.
(A) All 1981 and later model vehicles which
were equipped by the manufacturer with a catalytic converter(s) must be
equipped with the original equipment manufacturer converter(s) or United States
Federal Environmental Protection Agency-approved replacement converters. These
devices are located in the exhaust system, usually in front of the
muffler.
(B) Inspect catalytic
converter.
(C) Reject vehicle if:
1. Catalytic converter is bypassed or
modified, is not securely attached, has leakage or is patched by other than an
arc or acetylene weld; or
2. A 1981
or later model vehicle is not equipped with a catalytic converter, as equipped
by the manufacturer and as specified on the emission label.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.