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EMISSION CONTROL SYSTEMS
3CATALYTIC CONVERTOR
SH020A1-E (Not all models) Hyundai Coupe models are fitted with catalytic convertors which require spe- cial operating considerations. The cata-lytic convertor serves to oxidize cer- tain noxious elements of the exhaust gases leaving the engine to reduce thelevel of pollutants emitted from the vehicle and, provided that care is ex- ercised to prevent damage, the cata-lyst will operate efficiently for the life of the vehicle. It is of the utmost importance that the following information is read and un- derstood by the vehicle operator in order to prevent operational problemsarising from damage to the catalyst. Damage to the catalyst will result ifcontamination occurs through the useof leaded fuel. Whilst the vehicle is fitted with a reduced diameter filler neck to prevent charging of the fueltank with a leaded fuel pump nozzle, it is possible that the use of funnels or fuel cans will permit leaded fuel to beintroduced into the fuel tank.The catalyst is intolerant of unburntfuel and therefore if an engine misfirecondition exists, damage to the cata- lyst will occur. It is imperative that if a misfire condition develops, the ve-hicle is immediately presented to a Hyundai authorised repairer for rectifi- cation. Similarly, the practice of cer-tain ignition system diagnosis proce- dures which involve inducing a misfire (cylinder power balance tests for ex-ample) may result in catalyst damage.For these reasons, it is advisable thatthe exhaust gas emission be tested at each routine service with a gas analyzer having a Hydrocarbon mea-suring facility to ensure continued re- liability of the catalyst.
Catalytic Converter
OGK076501 Push or tow starting of the vehicle is to be avoided since unburnt fuel mayenter the catalyst and result in dam- age. (Note, it is impossible to push or tow start a Hyundai model equippedwith fuel injection since the fuel pump safety interlock will prevent the pump from operating under these conditions). Operation of the catalyst involves ex- tremely high temperatures being at- tained within the catalytic convertor,and although the convertor is fitted with heat shields, it is important that the vehicle is not parked over combus-tible or volatile material which may result in fire. If the above precautions are not ad- hered to and the catalyst becomes inoperative, the resultant increase incore temperature will result in a "melt down" where the catalyst core will melt and subsequently may block theexhaust system.Due to the fragile nature of the cata-lyst element, it is important that dam-age does not occur when the vehicle is raised by means of a garage jack. Care must also be exercised to avoiddriving over road hazards or debris which may cause damage to the cata- lyst element.
