Toyota 1HZ Repair Manual

FUEL SYSTEM Injection Pump FU-85
15. (1HD-T)
INSPECT BOOST COMPENSATOR CHARACTERISTIC
TENDENCY
(a) Apply pressure to the boost compensator.
(b) Measure injection volume.
16. (1HD-T)
CHECK HYSTERESIS
(w/o BACS)
Compare the injection volume when the boost compensa-
tor pressure is lowered from 0.81 kg/cm
2
(11.5 psi, 79 kPa)
to 0 kg/cm
2
(0 psi, 0 kPa) and, conversely, when it is
raised from zero.
(w/ BACS)
Compare the injection volume when the boost compensa-
tor pressure is lowered from 1.25 kg/cm
2
(18.3 psi, 127
kPa) to 0 kg/cm
2
(0 psi, 0 kPa) and, conversely, when it
is raised from zero.
HINT: Make measurements after moving the adjusting
lever between idle and maximum three times for each
lowering of the pressure.

Toyota 1HZ Specifications

General

Fuel Type	Diesel
Maximum Power	96 kW (129 hp) at 3800 rpm
Firing Order	1-5-3-6-2-4
Aspiration	Naturally aspirated
Fuel System	Direct injection
Cooling System	Water-cooled
Displacement	4.2 L (4164 cc)
Maximum Torque	285 N·m (210 lb·ft) at 2200 rpm
Valvetrain	SOHC, 12 valves (2 per cylinder)