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Home >> Acura >> 1997 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments - GS-R >> Adjustment >> Idle Speed
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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.
  1. 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. Turn engine off. Connect tachometer. Disconnect Idle Air Control (IAC) valve 2-pin connector. See Fig 1 .
  2. Restart engine with accelerator pedal slightly depressed. Stabilize engine at 1000 RPM and slowly allow engine to return to idle. Check base idle speed with transmission in "N" or "P" and all accessories, including cooling fan, off. Adjust base idle speed if not as specified. See IDLE SPEED SPECIFICATIONS  . See Fig 2 . After adjusting idle speed, ensure ignition timing is within specification.
  3. Turn ignition off. Reconnect 2-pin IAC valve connector. Remove BACK-UP fuse (7.5-amp) in main underhood fuse box for 10 seconds to reset ECM/PCM. Start engine and allow to idle for one minute with no loads. Check curb idle speed. Curb idle speed should be as specified. See IDLE SPEED SPECIFICATIONS  .
  4. Turn headlights on low and other accessories off. Idle engine for one minute and check load idle speed. See IDLE SPEED SPECIFICATIONS  .
  5. Turn headlights off and blower motor switch to high and A/C on. Idle engine for one minute and check load idle speed again. Load idle speed should be 800-900 RPM.
    IDLE SPEED SPECIFICATIONS

    Application (1) Base Idle RPM (2) Curb Idle RPM (3) Load Idle RPM
    GS-R 430-530 700-800 (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) Transmission in "N" or "P", IAC valve connected, headlights off, blower motor switch set to high and A/C on. Idle speed should be 800-900 RPM.
    Fig 1: Disconnecting IAC Valve (Typical)
    G92B26188Courtesy of AMERICAN HONDA CO., INC.
    Fig 2: Identifying Idle Speed Adjustment Screw (Typical)
    G92G26191Courtesy of AMERICAN HONDA MOTOR CO., INC.
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