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11.14.06.00.htm 11.14.06.00. Title 11 DEPARTMENT OF TRANSPORTATION Subtitle 14 MOTOR VEHICLE ADMINISTRATION ― VEHICLE INSPECTIONS Chapter 06 Emissions Equipment Standards Authority: Transportation Article, §12-104(b) and 23-104, Annotated Code of Maryland
11.14.06.01.htm 11.14.06.01. 01 Applicability.. The standards, requirements, and procedures set forth in this chapter are applicable to equipment originally installed by a vehicle manufacturer or required by federal or State requirements on all vehicles designated as a 1968 or newer model year. Each vehicle has an emissions label in the engine compartment which indicates the emissions equipment originally installed on the vehicle. If the label is not present, refer to an emissions control application guide.
11.14.06.02.htm 11.14.06.02. 02 Catalytic Converter.. A. Most 1975 and newer passenger cars and 1975 through 1978 light-duty trucks with a manufacturer's GVW of 6,000 pounds or less were originally equipped with a catalytic converter. Some passenger cars were not originally equipped with a converter until later model years, and 1979 and newer light-duty trucks with a manufacturer's GVW of 8,501 pounds or more may not have been originally equipped with a catalytic converter.
11.14.06.03.htm 11.14.06.03. 03 Fuel Filler Inlet Restrictor (INRES). A. Vehicles originally equipped with a catalytic converter were also equipped with a fuel filler inlet restrictor to prevent the entry of a leaded fuel pump nozzle.B. Some later model light-duty trucks were not equipped with a catalytic converter but were equipped with a fuel filler inlet restrictor. The fuel filler inlet restrictor is required on these vehicles.Procedures:. 1) Inspect for presence of fuel filler inlet restrictor..
11.14.06.04.htm 11.14.06.04. 04 Positive Crankcase Ventilation System (PCV). A. All 1968 and newer passenger cars and 1968 through 1978 light-duty trucks with a manufacturer's GVW of 6,000 pounds or less, and 1979 and newer light-duty trucks with a manufacturer's GVW of 8,500 pounds or less are equipped with a crankcase ventilation system.B. Early model vehicles may be equipped with an open crankcase ventilation system where air is drawn in through the oil filler tube. Later model vehicles are equipped with a c
11.14.06.05.htm 11.14.06.05. 05 Air Injection System (AIS). A. Many 1968 and newer model vehicles are equipped with an air injection system which supplies air to the exhaust ports to extend the combustion process in the exhaust system. The system may be equipped with an external air pump. The pulse, aspirator, suction, or reed injection systems are not equipped with an air pump. Newer model vehicles may be equipped with an air pump which supplies air directly to the catalytic converter.Reject Vehicle If:.
11.14.06.06.htm 11.14.06.06. 06 Exhaust Gas Recirculation System (EGR). A. Most 1973 and later model vehicles are equipped with an exhaust gas recirculation system to recirculate proper amounts of exhaust gases into the air/fuel mixture in the intake manifold. This recirculation into the manifold reduces combustion temperatures, thus reducing oxides of nitrogen (NOx) There are several types of EGR systems: a back pressure system which operates in conjunction with exhaust back pressure, a conv
11.14.06.07.htm 11.14.06.07. 07 Evaporative Emissions System (EVP). A. Most 1971 and newer vehicles and some older models are equipped with an evaporative emissions system to collect and store gasoline vapors and gasoline from the carburetor and fuel system during engine operation or shut down. The vapors are collected and stored in a canister containing a charcoal filter and gasoline is returned to the fuel tank. The vapors are purged from the canister and drawn into the engine when the
11.14.06.9999.htm 11.14.06.9999. Administrative History Effective date: April 1, 1991 (18:6 Md. R. 686).
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