Oklahoma OAC 595 Department of Public Safety, Chapter 20. Inspection and Equipment for Motor Vehicles, Subchapter 9. Class AE Inspection Station, Vehicle Emission Anti-Tampering Inspection, SIP effective April 29, 1996 (OKc46)
Regulatory Text:
Oklahoma Administrative Code. Title 595. Department of Public Safety
Chapter 20. Inspection and Equipment for Motor Vehicles (OAC 595:20)
SUBCHAPTER 9. CLASS AE INSPECTION STATION, VEHICLE EMISSION ANTI-TAMPERING INSPECTION (OAC 595:20-9)
Approved by EPA 02/29/96 (41 FR 7709) at 52.1920(c)(46) SIP effective 04/29/96.
Sections:
595:20-9-1. General
595:20-9-3. Vehicle emission inspection
595-20-9-7. Catalytic Converter System (C.A.T.)
595:20-9-10. Evaporative emission control system (E.N.P.)
595:20-9-11. Air injection system (A.I.S. or A.I.R.)
595:20-9-12. Positive crankcase ventilation system (P.C.V. Valve)
595:20-9-13. Oxygen sensor
595:20-9-14. Thermostatic air intake system (T.A.C.)
595:20-9-15. Exhaust gas recirculation system (E.G.R.)
595:20-9-1. General
(a) Effective January 1, 1987, any person who owns or drives a 1979 or later year model passenger car, station wagon, ranch wagon, suburban, town and country, or light truck up to 8,500 GVWR and resides within a county with a population of five hundred thousand (500,000) or more where there exists a U.S. Environmental Protection Agency, designated air quality nonattainment area for auto-related pollutants (see Appendices EE and FF of this Chapter), or resides within a twenty-five (25) mile radius of the centroid of the area of such a county shall, in addition to the vehicle mechanical equipment inspection, be required to submit said vehicle to a vehicle emission anti-tampering inspection.
Exemptions:
(1) Motor vehicles not capable of operating on gasoline or fuels containing gasoline without fuel system modification or conversion.
(2) Farm trucks.
(3) Truck of 8501 lbs. GVW and over.
(4) Forestry vehicles.
(5) Motorcycles.
595:20-9-3. Vehicle emission inspection
(l) For the purpose of the vehicle emission anti-tampering inspection, motor vehicles shall mean passenger cars, station wagons, ranch wagons, van wagons, suburban, town and country, and light trucks up to 8,500 pounds gross vehicular weight rating (GVWR). [47 O.S. § 1102(23)].
(1) Light duty truck means a motor vehicle with a gross vehicle weight rating of 8,500 pounds or less, which shall include, but not be limited to pickup trucks, panel delivery and carry-all trucks.
(2) Passenger car means any motor vehicle other than a motorcycle or bus designed or used primarily for the transportation of persons.
(3) When the model year of the engine of a motor vehicle is different from the body year, the body year will be used for vehicle emission anti-tampering inspection purposes.
(4) Exemptions:
(A) Motor vehicles powered by diesel fuel or any fuel other than gasoline or gasohol, if the vehicle design precludes the use of gasoline or gasohol without modification.
(B) Farm trucks.
(C) Truck of 8501 lbs. GVW and over.
(D) Forestry vehicles.
(E) Motorcyc1es.
(m) Specific inspection requirements for 1979 and after year model motor vehicles in the vehicle emission anti-tampering inspection program are as follows:
(1) Inspection items:
(A) Catalytic Converter System (C.A.T.)
(B) Evaporative Emission System (E.V.P.)
(C) Air Injection System (A.I.S.)
(D) Positive Crankcase Ventilation (P.C.V.)
(E) Oxygen Sensor (O2)
(F) Thermostatic Air Cleaner (T.A.C.)
(G) Exhaust Gas Recirculation System (E.G.R.)
(2) If a vehicle with a valid inspection sticker is presented for inspection, the complete inspection will be performed before removing the valid sticker. If the vehicle passes inspection, a new sticker will be issued. If the vehicle fails the inspection for any item, the sticker will be left on the windshield and a large "X" will be marked on the back.
(3) All vehicle emission anti-tampering inspection stations will be furnished copy of the Emissions Control Equipment Guide. This guide or manual must be readily available to inspectors for reference.
595-20-9-7. Catalytic Converter System (C.A.T.)
There are two different types of catalytic converter systems. One common type is the conventional converter systems, which has only the intake pipe and the outlet pipe. The other type converter system is called a three-way catalytic converter, which has an intake pipe, outlet pipe, and an outside air source which supplies fresh air to the C.A.T. system. The C.A.T. system will not pass inspection if any part of the system is disconnected or removed, regardless of whether it is a three-way or conventional system.
(1) Inspection procedures. Visually inspect the C.A.T. system for:
(A) Presence
(B) Proper connection
(2) Points of Rejection. Reject vehicle if C.A.T. is missing or has been disconnected in any manner. Advise owner that a dated repair receipt or sales invoice must be presented upon re-inspection.
595:20-9-10. Evaporative emission control system (E.N.P.)
(a) General. The evaporative emission control system helps prevent gasoline vapors from entering the atmosphere by trapping the vapors in a carbon canister. Later, when the vehicle is running, the vapors in the, canister are purged into the intake of the carburetor. The evaporative emission control system includes the charcoal canister, the hoses to the canister and the filler tube cap.
(b) Inspection procedures.
(1) Visually inspect for presence of canister.
(2) Check for presence of hoses.
(3) Check for presence of fuel tank cap, proper fit, seal, and relief valve.
(c) Points of rejection. Reject the vehicle if any part of the evaporative control system has been removed or disconnected and proper fit, seal, and valve of cap.
595:20-9-11. Air injection system (A.I.S. or A.I.R.)
(a) General. To be effective, an oxidation catalyst must have excess air in the exhaust stream. This source of air can be provided by either lean carburetor setting (a carburetor that meters more air than is needed to burn the fuel) or by air injection system which pumps air directly into the exhaust stream. Inspection for disabled air injection systems on vehicles so equipped will help insure that the exhaust has adequate oxygen for the catalyst to oxidize pollutants. The air injection system includes a belt driven pump and connecting hoses. Check valve and bypass. Inspect the air injection system for presence of air pump and belts.
595:20-9-12. Positive crankcase ventilation system (P.C.V. Valve)
(a) General. Vented vapors from the crankcase are a major source of hydrocarbon emissions and were the first hydrocarbon mobile source emissions to be controlled. Control is achieved by recycling the vapors through the carburetor via the crankcase ventilation system. If the system is disabled, hydrocarbon emissions vented from the crankcase greatly increase. The P.C.V. valve is located on the valve cover in most vehicles. Proper connection of the P.C.V. valve and hoses at the valve cover and carburetor or intake manifold should be checked.
595:20-9-13. Oxygen sensor
(a) Three-way catalyst. Most new technology vehicles are expected to use a three-way catalyst (T.W.C.) with closed loop fuel air ratio control system.
(1) On vehicles with closed loop fuel control system, the carburetor or fuel metering system is controlled by an electronic control module (E.C.M.).
(2) The E.C.M. regulates the air/fuel ratio on the basis of several inputs, the most important being the oxygen sensor.
(3) The oxygen sensor tells the E.C.M. if the carburetor is operating at proper air/fuel ratio for operation of the three-way converter. The electronic control module regulates the carburetor to maintain this condition.
(4) Sensors reduce HC emissions because (a) when sensor is disconnected, vehicle will operate in fuel rich failure mode, and (b) operation in fuel rich failure mode can cause hydrocarbon emissions to be ten (10) times higher than that allowed by Federal Emission Standards. Inspect the oxygen sensor to insure that no part of the system, including wiring, has been removed or disconnected.
595:20-9-14. Thermostatic air intake system (T.A.C.)
(a) General. The thermostatic air system (T.A.C.) provides warm air to the carburetor during cold engine operation and keeps temperature of air entering the carburetor at 100 degrees F. This shortens warmup time and allows the carburetor to be adjusted much leaner to reduce emissions. Inspect the T.A.C. system to insure that no part of the system has been removed or disconnected.
(b) Inspection procedures.
(1) Visually inspect the thermostatic air intake system for the fresh air intake at front of the vehicle.
(2) Check vacuum motor or wax pellet actuator on breather intake.
(3) Check the duct and air control door.
(4) Check the heat shroud and heated air tube.
(5) Check the air cleaner assembly.
(6) Check the hoses and tubing.
595:20-9-15. Exhaust gas recirculation system (E.G.R.)
(a) General. The exhaust gas recirculation system, commonly known as the E.G.R. valve, is located on the intake manifold near the carburetor. A close visual check of the hoses and E.G.R. spacer plate will be necessary to detect tampering. A high percentage of tampering done to exhaust emission systems is to the valve. Inspect the E.G.R. system to insure that no part of the system has been removed or disconnected.
***end OK OAC 595 Chapter 20 Subchapter 9 SIP effective April 29, 1996 (OKc46)***cx28***