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Home >> Acura >> 1996 >> 2.5TL >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Adjustment >> Idle Speed & Mixture >> Idle Speed

Idle Speed

  1. Operate engine until cooling fan comes on. Turn engine off. Connect tachometer. Disconnect 2-wire connector from Idle Air Control Valve (IACV). See Fig 1.
  2. Restart engine and hold at 1000 RPM momentarily. Let engine return to idle. Check base idle speed with M/T in Neutral (A/T in "N" or "P") and all accessories, including cooling fan, off. Base idle speed should be 500-600 RPM. If necessary, turn screw to adjust base idle speed. See Fig 2.
  3. Turn ignition off. Reconnect 2-wire IACV connector. Remove BACK-UP fuse (10-amp) in main underhood fuse box for 10 seconds to reset PCM. Start engine and allow to idle for one minute. Check idle speed. Idle speed should be as specified. See IDLE SPEED SPECIFICATIONS .
    Fig 1: Disconnecting IAC Valve
    G92B26188Courtesy of AMERICAN HONDA CO., INC.
    Fig 2: Identifying Idle Speed Adjustment Screw
    G92G26191Courtesy of AMERICAN HONDA MOTOR CO., INC.
    IDLE SPEED SPECIFICATIONS

    Application (1) Base Idle RPM (2) Curb Idle RPM
    2.5TL 500-600 720-820
    (1) Transmission in "N" or "P" and IAC valve disconnected.
    (2) Transmission in "N" or "P" and IAC valve connected.
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