444
2007 TUNDRA from Jul. ’07 Prod. (OM34463U)
XS20015
Long reach
type
Your engine is fitted with long reach
iridium−tipped spark plugs.
NOTICE
Use only iridium−tipped spark plugs.
Do not adjust gaps for engine perfor-
mance smooth driveability.
For details about the spark plug type, see
“Service specifications” on page 582 in
Section 8.
The tandem master cylinder brake system
is a hydraulic system with two separate
sub−systems. If either sub−system should
fail, the other will still work. However, the
pedal will be harder to press, and your
stopping distance will increase. Also, the
brake system warning light may come on.
CAUTION
Do not drive your vehicle with only a
single brake system. Have your
brakes fixed immediately.
BRAKE BOOSTER
The brake booster uses engine vacuum to
power−assist the brakes. If the engine
should quit while you are driving, you can
bring the vehicle to a stop with normal
pedal pressure. There is enough reserved
vacuum for one or two stops—but no
more!
CAUTION
D Do not pump the brake pedal if the
engine stalls. Each push on the
pedal uses up your reserved vacu-
um.
D Even if the power assist is com-
pletely lost, the brakes will still
work. But you will have to push the
pedal hard, much harder than nor-
mal. And your braking distance will
increase.
07 04.26
Long reach iridium−tipped
spark plugs [5.7 L V8 (3UR−FE)
engine] Brake system
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