Engine Idle Air Control (IAC) Valve

Precision Idle Speed Regulation for Ford, Mazda, and Mercury V6 & V8 Models

Restore the smooth, consistent idle of your fuel-injected engine with this high-quality Idle Air Control (IAC) Valve. As a vital component of the air-induction system, the IAC valve manages the volume of air that bypasses the throttle plate when your foot is off the accelerator. By precisely adjusting this airflow, the Engine Control Unit (ECU) can maintain a steady idle speed, even as loads change from the air conditioning system, power steering, or alternator.

Common signs of a failing IAC valve include engine stalling at stoplights, erratic surging at idle, or a "check engine" light. This replacement unit is engineered to match the original equipment's airflow curves and response times, ensuring your vehicle remains reliable in all driving conditions.

Fitment Verification and Vehicle Applications

This IAC Valve is designed for the following vehicles, primarily those equipped with 4.0L V6 or 5.0L/5.8L V8 engines:

• Ford F-150 / F-250 / F-350 Truck: 1987–1993 (5.0L V8); 1988–1990 (5.8L V8).

• Ford Bronco: 1987–1993 (5.0L V8); 1988–1989 (5.8L V8).

• Ford Econoline (E-150, E-250, E-350): 1987–1993 (5.0L V8); 1988–1990 (5.8L V8).

• Ford Explorer / Ranger / Aerostar: 1990–1995 (4.0L V6).

• Mazda B4000 Truck: 1994.

• Mazda Navajo: 1991–1994.

Technical Specifications and Attributes

• Operation: Electromagnetic Solenoid for rapid air-metering.

• Connector Type: 2-Pin Plug-and-Play interface.

• Housing Material: Die-Cast Aluminum for heat dissipation and durability.

• Port Type: Standard 2-Bolt mounting flange.

• Fitment Type: Direct Replacement.

What’s in the Box

• (1) Engine Idle Air Control Valve

• (1) Precision-Cut Mounting Gasket

Industry Cross-Reference Numbers

• Standard Motor Products (SMP): AC23, AC23T

• Walker Products: 215-2005

• TRQ: AIA93083

• General Motors: 17119297

• Ford / Motorcraft: E6AZ9F715A, E9TZ9F715BA, CX1328

Installation and Technical Tips

• Carbon Removal: Before installing the new unit, use a throttle body cleaner and a soft-bristle brush to remove carbon deposits from the air passages on the intake manifold. Buildup in these ports can obstruct the new valve and lead to a persistent rough idle.

• Vacuum Leak Prevention: Always use the included new gasket. A failure to achieve an airtight seal at the mounting flange will create a vacuum leak, which usually results in an uncontrollably high idle speed.

• Electrical Inspection: Inspect the harness connector for signs of corrosion or "pin-push-out." A weak electrical connection can prevent the solenoid from cycling correctly, leading to intermittent stalling.

• Idle Relearn Procedure: After installation, start the engine and allow it to reach operating temperature without touching the gas pedal. Let it idle for several minutes to allow the ECU to calibrate the new valve's internal plunger position.