Acura NSX 1997 Service Manual page 242

Main Menu
Idle Speed Setting
Inspection/Adjustment
NOTE: Before setting the idle speed, check the these
items:
The MIL has not been reported on.
Ignition timing
Spark plugs
Air cleaner
PCV system
1. Start the engine. Hold the engine at 3,000 rpm with
no load (A/T in or
the radiator fan comes on, then turn the ignition
switch OFF.
2. Connect the SCS service connector to service check
connector.
3. Connect a OBDII scan tool (see page 11-38) or
tachometer.
Connect a tachometer to loop of igniter unit sec-
ondary, or...
Remove the rubber cap from the tachometer
connector and connect a tachometer.
Table of Contents
position, M/T in neutral) until
TACHOMETER
TACHOMETER
CONNECTOR
4. Restart the engine.
5. Check idling in no-load conditions in which the
headlights, blower fan, rear defogger, cooling fan,
and air conditioner are not operating. Do not
depress the accelerator pedal.
Idle speed should be:
Adjust the idle speed, if necessary, by turning the
idle adjusting screw. After adjusting the idle speed,
check the ignition timing (see
of spec, go back to step 4.
6. Disconnect the SCS service connector.
7. Depress the accelerator pedal and stabilize the
engine speed at 1,000 rpm, then slowly release the
pedal until the engine idles, then check the idle
speed.
Idle speed should be:
section 23). If it is out
IDLE ADJUSTING
SCREW