Honda Acura NSX 1991 Service Manual page 260

Idle Control System
Inspection/Adjustment
1. Start the engine and warm it up to normal operating
temperature (the cooling fan comes on).
2. Connect a tachometer.
l Connect a tachometer to loop of igniter unit
secondary, or...
connector and connect
TACHOMETER
TACHOMETER
CONNECTOR
I I - 8 4
TACHOMETER
a tachometer.
3. Disconnect the 2P connector from the EACV.
EACV
4. Start the engine with the accelerator pedal slightly
depressed. Stabilize the rpm at 1000, then slowly
release the pedal until the engine idles.
5. Check idling in no-load conditions in which the
headlights, blower fan, rear defogger, cooling fan,
and air conditioner are not operating.
Manual
600 f 50 rpm (in gear)
Automatic
Adjust the idle speed, if necessary, by turning the
idle adjusting screw.
650 * 50 rpm
IDLE ADJUSTING