Toyota 4-Runner 1985 Repair Manual page 129

EMISSION CONTROL SYSTEMS (CARB.) -
Dash Pot (DP) System
EC-29
ECl190
3,000 rpm
Tachometer
ECl191 EC0137
ECl191
INSPECTION OF DP SYSTEM
1. WARM UP ENGINE
2. CHECK IDLE SPEED AND ADJUST, IF NECESSARY
3. CHECK DP SETTING SPEED
(a) Open the throttle valve untill the throttle lever
separates from the DP end.
(b) Release the throttle valve gradually, and check the DP
setting speed when the throttle lever touches the DP
end.
DP setting speed: 3,000 rpm
If the speed is not as specified, unlock the lock nut, and
adjust the setting speed by turnning the DP diaphragm.