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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 734 (Noise, Vibration & Harshness) >> Diagnosis And Testing >> Noise, Vibration and Harshness (NVH) >> Component Tests >> Idle Air Control (IAC) Valve

Idle Air Control (IAC) Valve

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Open the hood.
    2. NOTE: Key symptom is elevated idle speed while noise is occurring.
    NOTE: "Snapping" the throttle can induce the noise.
  2. Verify the condition by operating the vehicle for a short time.
  3. Inspect the IAC valve. If physical evidence of contamination exists, install a new IAC valve.
  4. While the noise is occurring, either place an EngineEAR probe near the IAC valve and the inlet tube, or create a 6.35 mm (0.25 in)-12.7 mm (0.50 in) air gap between the inlet tube and the clean air tube. If the IAC valve is making the noise, install a new IAC valve.
  5. Test the vehicle for normal operation.
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