Three−Way Catalytic Converters; Emission Control Device - Toyota 2008 4Runner Owner's Manual

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Three−way catalytic converters
CY20011
The three−way catalytic converter is an
emission control device installed in the
exhaust system.
The purpose is to reduce pollutants in the
exhaust gas.
CAUTION
Keep people and combustible mate-
D
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
Do not idle or park your vehicle
D
over anything that might burn easi-
ly such as grass, leaves, paper or
rags.
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NOTICE
A large amount of unburned gases
flowing into the three−way catalytic
converter may cause it to overheat
and create a fire hazard. To prevent
this and other damage, observe the
following precautions:
z Use only unleaded gasoline.
z Do not drive with an extremely low
fuel level; running out of fuel could
cause the engine to misfire, creat-
ing an excessive load on the three−
way catalytic converter.
z Do not allow the engine to run at
idle speed for more than 20 min-
utes.
z Avoid racing the engine.
z Do not push−start or pull−start your
vehicle.
z Do not turn off the engine switch
while the vehicle is moving.
z Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic ignition
system/distributor ignition system
or fuel systems could cause an ex-
tremely high three−way catalytic
converter temperature.
z If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check−up as soon
as possible. Remember, your Toyota
dealer knows your vehicle and its
three−way catalytic converter sys-
tem best.
z To ensure that the three−way
catalytic converter and the entire
emission control system operate
properly, your vehicle must receive
the periodic inspections required by
the Toyota Maintenance Schedule.
For scheduled maintenance
information, refer to the "Scheduled
Maintenance Guide" or "Owner's
Manual Supplement".