Toyota 4Runner 1999 Owner's Manual page 182

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
D
Keep people and combustible mate-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
D
Do not drive, idle or park your ve-
hicle over anything that might burn
easily such as grass, leaves, paper
or rags.
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 ignition while
the vehicle is moving.
4RUNNER (
z Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic ignition
system/distributor ignition
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 cata-
lytic converter and the entire emis-
sion control system operate proper-
ly, your vehicle must receive the
periodic inspections required by the
Toyota Maintenance Schedule. For
scheduled maintenance information,
refer to the separate "Scheduled
Maintenance Guide" or "Owner's
Manual Supplement".
)
system
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