Idle Speed

Start engine and warm to normal operating temperature. Turn ignition off. Disconnect Throttle Position (TP) sensor harness connector. Start engine.
Increase engine speed to 2000 RPM, 2 or 3 times, then allow engine to return to idle. Ensure ignition timing is set correctly. Check idle speed. See the IDLE SPEED & CO% LEVEL table.
If idle speed is incorrect, adjust idle speed by turning idle speed adjusting screw. See Fig 1 . With idle speed correctly set, turn ignition off. Reconnect TP sensor and recheck idle speed.

IDLE SPEED & CO LEVEL

Application

⁽¹⁾ Idle RPM

⁽²⁾ Idle RPM

⁽³⁾ Maximum CO Level

A/T

⁽⁴⁾ 750-850

⁽⁴⁾ 675-775

7.0%

M/T

625-725

550-650

7.0%

⁽¹⁾	With throttle position sensor connected.

⁽²⁾	With throttle position sensor disconnected.

⁽³⁾	Measured in Self-Diagnostic Mode II.

⁽⁴⁾	Automatic transmission/transaxle in Neutral.

Fig 1: Adjusting Idle Speed

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