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Home >> Infiniti >> 1992 >> Q45 Base >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Introduction >> 4-Cylinder Idle Speed
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4-Cylinder Idle Speed

  1. Warm engine to normal operating temperature (needle in middle of coolant gauge). Check and adjust ignition timing (if necessary). See IGNITION TIMING.
  2. Turn engine off. Disconnect throttle position sensor connector and restart engine. Check idle speed. If idle speed is not within specification, turn idle speed screw on airflow meter. See IDLE SPEED & CO LEVEL  table.
  3. Turn engine off. Reconnect throttle position sensor connector and restart engine. Run engine at 2000 RPM for about 2 minutes under no load, and then return it to idle. Idle speed should be as specified.
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