Idle Speed

NOTE: Before setting idle speed ensure MIL has/is not been on, ignition timing is correct, spark plugs and air cleaner are okay, and PCV system is operating properly.

NOTE: On models equipped with Daytime Running Lights (DRL), apply parking brake, and with engine running, ensure headlights are off.

Disconnect EVAP purge control solenoid valve 2-pin connector. Do not disconnect Idle Air Control (IAC) valve connector. Connect a tachometer. Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral, until radiator fan comes on. Allow engine to idle.
Check base idle speed. See IDLE SPEED SPECIFICATIONS . If necessary, turn idle adjusting screw to correct idle. Recheck idle speed after each 1/4-turn of idle adjusting screw.

Turn blower motor switch to high and A/C on. Check load idle speed. See IDLE SPEED SPECIFICATIONS . If necessary, turn idle adjusting screw to correct idle. Do not turn idle adjusting screw when A/C is on. Recheck idle speed after each 1/4-turn of idle adjusting screw. If idle speed is not as specified, go to the TESTS W/O CODES article. Connect EVAP purge control solenoid valve 2-pin connector.

IDLE SPEED SPECIFICATIONS

Application

⁽¹⁾ Base Idle RPM

⁽²⁾ Curb Idle RPM

⁽³⁾ Load Idle RPM

3.0CL

700-800

⁽⁴⁾ 700-800

⁽¹⁾	Transmission in "N" or "P" and IAC valve disconnected and no accessory loads.

⁽²⁾	Transmission in "N" or "P", IAC valve connected and no accessory loads.

⁽³⁾	Transmission in "N" or "P", IAC valve connected and headlights on low.

⁽⁴⁾	With headlights off and blower motor switch set to high and A/C on.