7
EMISSION CONTROL SYSTEMS
3
CATALYTIC CONVERTER
SH020A1-E
Catalytic Convertor Operation
Precautions
; For a petrol engine
HFC505
Hyundai Matrix 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 the
level 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.
Catalytic Converter
It is of the utmost importance that the
following information is read and un-
derstood by the vehicle operator in
order to prevent operational problems
arising from damage to the catalyst.
Damage to the catalyst will result if
contamination occurs through the use
of leaded fuel. Whilst the vehicle is
fitted with a reduced diameter filler
neck to prevent charging of the fuel
tank with a leaded fuel pump nozzle, it
is possible that the use of funnels or
fuel cans will permit leaded fuel to be
introduced into the fuel tank.
The catalyst is intolerant of unburnt
fuel and therefore if an engine misfire
condition 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 that
the exhaust gas emission be tested at
each routine service with a gas ana-
lyzer having a Hydrocarbon measuring
facility to ensure continued reliability
of the catalyst.
Push or tow starting of the vehicle is to
be avoided since unburnt fuel may
enter the catalyst and result in dam-
age. (Note, it is impossible to push or
tow start a Hyundai model equipped
with 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 in
core temperature will result in a "melt
down" where the catalyst core will melt
and subsequently may block the ex-
haust system.
fcuk-7.p65 12/27/2006, 10:17 AM3
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