Toyota 1PZ Repair Manual page 227

FU-88 FUEL SYSTEM Injection Pump
(n) Check the protrusion of the governor shaft.
Protrusion: 0.5-2.0 mm (0.020-0.079 in.)
18. ADJUST IDLE SPEED
(a) (w/ Dash Pot)
Using pliers, remove the dash pot cover.
(b) (w/ Dash Pot)
Fully loosen the dash pot adjusting screw.
(c) Measure the injection volume for each pump rpm.