1998 TOYOTA TACOMA engine overheat

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With tachometer
Without tachometer The gauge indicates the engine coolant
temperature when the ignition switch is
on. The engine operating temperature
will vary with changes in weather and
engine load.
If the needle moves into the red zone,
your engine is too hot. If your vehicle
overheats, stop your vehicle and allow the
engine to cool.
Your vehicle may overheat during severe
operating conditions, such as:
Driving up a long hill on a hot day.
Reducing speed or stopping after high
speed driving.
Idling for a long period with the air
conditioning on in stop-and-go traffic.
Towing a trailer.
NOTICE
Do not remove the thermostat in
the engine cooling system as thismay cause the engine to overheat.The thermostat is designed to con-
trol the flow of coolant to keep thetemperature of the engine withinthe specified operating range.
Do not continue driving with an overheated engine. See ºIf your ve-hicle overheatsº in Part 4.
Engine coolant temperature
gauge

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NOTICE
To prevent engine overrevving, do not downshift if you are going fast-er than the above speed in each position.
Be careful not to overrev the en-gine. Watch the tachometer to keep engine rpm from going into the red
zone. The approximate maximum al-lowable speed for each position is
given below for your reference:
º2º 124 km/h (77 mph). . .
ºLº 72 km/h (45 mph) . . .
Do not continue hill climbing for a
long time in the º2º or ºLº posi-
tion. This may cause severe auto-matic transmission damage fromoverheating. To prevent such dam-
age, use ºDº position for hill climb-ing or hard towing.
(d) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the selector lever to the
ºRº position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.
(e) Parking
1. Bring the vehicle to a complete stop.
2. Pull the parking brake lever fully to securely apply the parking brake.
3. With the brake pedal pressed down, shift the selector lever to the ºPº posi-
tion.
CAUTION
While the vehicle is moving, never
attempt to move the selector lever
into ºPº position under any circum-
stances. Serious mechanical damage
and loss of vehicle control may re-
sult.
(f) Good driving practice
If the transmission is repeatedly up-
shifted and downshifted between third
gear and overdrive when climbing a
gentle slope, the overdrive switch
should be turned off. Be sure to turn
the switch on immediately afterward.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use overdrive.
CAUTION
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping.
NOTICE
Do not hold the vehicle on an up-
grade with the accelerator pedal. Itcan cause the transmission to over- heat. Always use the brake pedal or
parking brake.

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NOTICE
Be careful not to overrev the en- gine. Watch the tachometer to keepengine rpm from going into the red zone. The approximate maximum al-
lowable speed for each position isgiven below for your reference:
º2º 136 km/h (85 mph). . .
ºLº 74 km/h (46 mph) . . .
Do not continue hill climbing for a
long time in the º2º or ºLº posi-tion. This may cause severe auto- matic transmission damage from
overheating. To prevent such dam-age, use ºDº position for hill climb-
ing or hard towing.
(d) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the selector lever to the
ºRº position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.
(e) Parking
1. Bring the vehicle to a complete stop.
2. Pull the parking brake lever fully to securely apply the parking brake.
3. With the brake pedal pressed down, shift the selector lever to the ºPº posi-
tion.
CAUTION
While the vehicle is moving, never
attempt to move the selector lever
into ºPº position under any circum-
stances. Serious mechanical damage
and loss of vehicle control may re-
sult.
(f) Good driving practice
If the transmission is repeatedly up-
shifted and downshifted between third
gear and overdrive when climbing a
gentle slope, the overdrive switch
should be turned off. Be sure to turn
the switch on immediately afterward.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use overdrive.
CAUTION
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping.
NOTICE
Do not hold the vehicle on an up-
grade with the accelerator pedal. Itcan cause the transmission to over- heat. Always use the brake pedal or
parking brake.
(g) Driving in ºPOWERº mode
In the ºPOWERº mode, the transmission
is shifted up and down at a higher vehicle
speed than in the ºNORMALº mode and a
more powerful acceleration is achieved. To
set the ºPOWERº mode, push in the driv-
ing pattern selector button. The POWER
mode indicator light comes on.
For ordinary driving, Toyota recommends
using the ºNORMALº mode to improve fuel
economy.

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Vehicles with cruise control±When the
cruise control is being used, even if you
downshift the transmission by turning off
the overdrive switch, engine braking will
not be applied because the cruise control
is not cancelled. For ways to decrease
the vehicle speed, see ºCruise controlº in
this chapter.
CAUTION
Be careful when downshifting on a
slippery surface. Abrupt shifting
could cause the vehicle to spin or
skid.
(c) Using º2º and ºLº positions
The º2º and ºLº positions are used for
strong engine braking as described pre-
viously.
With the selector lever in º2º or ºLº, you
can start the vehicle in motion as with the
lever in ºDº.
With the selector lever in º2º, the vehicle
will start in the first gear and automatical-
ly shift to the second gear.
With the selector lever in ºLº, the trans-
mission is engaged in the first gear.
NOTICE
Be careful not to overrev the en-
gine. Watch the tachometer to keepengine rpm from going into the redzone. The approximate maximum al-
lowable speed for each position isgiven below for your reference:
Four-wheel drive models Front drive control lever in ºH2º orºH4ºÐ
3RZ- FE engine º2º 109 km/h (68 mph) . . . .
ºLº 60 km/h (37 mph) . . . .
5VZ- FE engine º2º 120 km/h (75 mph) . . . .
ºLº 66 km/h (41 mph) . . . .
Front drive control lever in ºL4ºÐ
3RZ- FE engine º2º 43 km/h (27 mph) . . . . . .
ºLº 22 km/h (14 mph) . . . . . .
5VZ- FE engine º2º 46 km/h (29 mph) . . . . . .
ºLº 25 km/h (16 mph) . . . . . .
Pre Runner
3RZ- FE engine º2º 114 km/h (71 mph) . . . . . .
ºLº 63 km/h (39 mph) . . . . . .
5VZ- FE engine º2º 120 km/h (75 mph) . . . . . .
ºLº 66 km/h (41 mph) . . . . . .
Do not continue hill climbing for a
long time in the º2º or ºLº posi-
tion. This may cause severe auto-matic transmission damage from overheating. To prevent such dam-
age, use ºDº position for hill climb-ing or hard towing.
(d) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the selector lever to the
ºRº position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.

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Three-way catalytic converter
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-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
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 catalyticconverter may cause it to overheat and create a fire hazard. To prevent
this and other damage, observe thefollowing precautions:
Use only unleaded gasoline.
Do not drive with an extremely lowfuel level; running out of fuel could
cause the engine to misfire, creat-ing an excessive load on the three- way catalytic converter.
Do not allow the engine to run atidle speed for more than 20 minu-
tes.
Avoid racing the engine.
Do not push-start or pull-start yourvehicle.
Do not turn off the ignition while
the vehicle is moving.
Keep your engine in good runningorder. Malfunctions in the engineelectrical system, electronic ignitionsystem/distributor ignition system
or fuel systems could cause an ex-tremely high three-way catalyticconverter temperature.
If the engine becomes difficult to start or stalls frequently, take yourvehicle in for a check-up as soon
as possible. Remember, your Toyotadealer knows your vehicle and itsthree-way catalytic converter system
best.
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 theToyota Maintenance Schedule. Forscheduled maintenance information,
refer to the separate ºOwner'sManual Supplement/MaintenanceScheduleº.

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(b) Starting the engine
Before starting the engine, be sure to fol-
low the instructions in º(a) Before crank-
ingº.
Normal starting procedure
The multiport fuel injection system/sequen-
tial multiport fuel injection system in your
engine automatically controls the proper
air-fuel mixture for starting. You can start
a cold or hot engine as follows:
1. With your foot off the accelerator ped- al, crank the engine by turning the key
to ºSTARTº. Release it when the en-
gine starts.
2. After the engine runs for about 10 se- conds, you are ready to drive.
If the weather is below freezing, let the
engine warm up for a few minutes before
driving.
If the engine stalls 0
Simply restart it, using the correct proce-
dure given in normal starting.
If the engine will not startÐ
See ºIf your vehicle will not startº in Part 4.
NOTICE
Do not crank for more than 30 se- conds at a time. This may overheatthe starter and wiring systems.
Do not race a cold engine.
If the engine becomes difficult tostart or stalls frequently, have the
engine checked immediately.
Always slow down in gusty crosswinds.
This will allow you much better control.
Drive slowly onto curbs and, if pos-
sible, at a right angle. Avoid driving
onto high, sharp-edged objects and oth-
er road hazards. Failure to do so can
lead to severe tire damage resulting in
tire bursts.
When parking on a hill, turn the front
wheels until they touch the curb so
that the vehicle will not roll. Apply the
parking brake, and place the transmis-
sion in ºPº (automatic) or in first or
reverse (manual). If necessary, block
the wheels.
Washing your vehicle or driving through
deep water may get the brakes wet. To
see whether they are wet, check that
there is no traffic near you, and then
press the pedal lightly. If you do not
feel a normal braking force, the brakes
are probably wet. To dry them, drive
the vehicle cautiously while lightly
pressing the brake pedal with the park-
ing brake pulled. If they still do not
work safely, pull to the side of the road
and call a Toyota dealer for assistance.
Tips for driving in various
conditions

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Four-wheel drive modelsÐToyota rec-
ommends not using four-wheel drive on
dry hard-surfaced roads, because four-
wheel driving will cause unnecessary
noise and wear, and poor fuel econo-
my.
Four-wheel drive modelsÐIn cold tem-
peratures, noise may occur when driv-
ing in two-wheel drive before the trans-
fer is warmed up. Therefore, first drive
in four-wheel drive until the transfer is
warmed up.
CAUTION
Before driving off, make sure that
the parking brake is fully released
and the parking brake reminder
light is off.
Do not leave your vehicle unat-
tended while the engine is running.
Do not rest your foot on the brake
pedal while driving. It can cause
dangerous overheating, needless
wear, and poor fuel economy.
Be careful when accelerating, up-
shifting, downshifting or braking on
a slippery surface. Sudden accelera-
tion or engine braking, could cause
the vehicle to spin or skid.To drive down a long or steep hill,
reduce your speed and downshift.
Remember, if you ride the brakes
excessively, they may overheat and
not work properly.
Do not drive in excess of the speed
limit. Even if the legal speed limit
permits it, do not drive over 140
km/h (85 mph) unless your vehicle
has high-speed capability tires.
Driving over 140 km/h (85 mph) may
result in tire failure, loss of control
and possible injury. Be sure to con-
sult a tire dealer to determine
whether the tires on your vehicle
are high-speed capability tires or
not before driving at such speeds.
Do not continue normal driving
when the brakes are wet. If they are
wet, your vehicle will require a
longer stopping distance, and it
may pull to one side when the
brakes are applied. Also, the park-
ing brake will not hold the vehicle
securely.

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In order to maintain engine braking effi-
ciency, do not use fifth gear (manual
transmission) or overdrive (automatic
transmission).
Because of the added load of the trail-
er, your vehicle's engine may overheat
on hot days (at temperatures over 305C [85 5F]) when going up a long or
steep grade with a trailer. If the engine
coolant temperature gauge indicates
overheating, immediately turn off the air
conditioning (if in use), pull off the road
and stop in a safe spot. Refer to ºIf
your vehicle overheatsº in Part 4 of
this manual.
Always place wheel blocks under both
the vehicle and trailer wheels when
parking. Apply the parking brake firmly.
Put the transmission in ºPº (automatic)
or in first or reverse (manual). Avoid
parking on a slope with a trailer, but
if it cannot be avoided, do so only
after performing the following:
1. Apply the brakes and hold.
2. Have someone place wheel blocks un- der both the vehicle and trailer wheels.
3. When the wheel blocks are in place, release your brakes slowly until the
blocks absorb the load. 4. Apply the parking brake firmly.
5. Shift into first or reverse (manual) or
ºPº (automatic) and turn off the engine.
When restarting out after parking on a
slope:
1. With the transmission in ºPº position (automatic) or the clutch pedal de-
pressed (manual), start the engine.
(With an automatic transmission, be
sure to keep the brake pedal de-
pressed.)
2. Shift into gear.
3. Release the parking brake (also foot brake on automatic transmission ve-
hicles) and slowly pull or back away
from the wheel blo cks. Stop and apply
your brakes.
4. Have someone retrieve the blo cks.
CAUTION
Do not exceed 72 km/h (45 mph) or
the posted towing speed limit,
whichever is lower. Because insta-
bility (swaying) of a towing vehicle-
trailer combination usually in-
creases as the speed increases, ex-
ceeding 72 km/h (45 mph) may
cause loss of control.
Slow down and downshift before
descending steep or long downhill
grades. Do not make sudden down-
shifts.
Avoid holding the brake pedal down
too long or too frequently. This
could cause the brakes to overheat
and result in reduced braking effi-
ciency.