Idle Speed

Warm engine to normal operating temperature. Check and adjust ignition timing (if necessary). See IGNITION TIMING .
Check idle speed. If idle speed is not within specification, disconnect Idle Air Control Valve-Auxiliary Air Control (IACV-AAC) valve harness connector. Turn idle speed screw on IACV-AAC valve unit. See Fig 1 . See IDLE SPEED & CO LEVEL table.
Connect IACV-AAC valve harness connector. Run engine at 2000 RPM for about 2 minutes under no load and then return to idle. Idle speed should be as specified.

IDLE SPEED & CO LEVEL

Application

⁽¹⁾ Idle RPM

CO Level

Q45

600-700

N/A

⁽¹⁾	With transmission in Neutral and no electrical load on engine.

Fig 1: Locating Idle Speed Adjustment Screw (Q45)

Courtesy of NISSAN MOTOR CO., U.S.A.