Standard Ignition AC58 Idle Air Control Valve

Idle Air Control Valve for Ford and Mazda Applications

Standard Ignition AC58 is an idle air control valve built for precise airflow management at idle. It uses a polymer-blended isotropic neodymium/iron/boron magnet, a high-strength stepping motor, and a shielded ball bearing to support accurate pintle movement and long service life.

Fits 1992-1995 Ford Aerostar, N/A; Fits 1992-1995 Ford Taurus, N/A; Fits 1992-1994 Ford Ranger, N/A; Fits 1992-1994 Ford Tempo, N/A; Fits 1993-1995 Mercury Sable, N/A; Fits 1992-1994 Mercury Topaz, N/A; Fits 1994 Mazda B3000, N/A; Fits 1995-1997 Ford Windstar, N/A; Fits 1997 Mazda B3000, N/A.

• Terminal quantity: 2
• Blade terminal design for direct electrical connection
• Stepping motor construction for controlled idle airflow response
• Shielded ball bearing helps resist environmental contaminants
• Load-tested actuator for force output above actual operating load
• Manufactured with high-grade materials for extended service life

Detailed Product Overview

Standard Ignition AC58 is an idle air control valve for Ford and Mazda fuel injection systems that need stable idle speed management. It is engineered to regulate bypass air around the throttle plate so the engine can maintain a steady idle during cold starts, accessory load changes, and stop-and-go driving. This part number, AC58, is listed for 1992-1995 Ford Aerostar, Taurus, Ranger, and Tempo, 1993-1995 Mercury Sable, 1992-1994 Mercury Topaz, and 1994-1997 Mazda B3000 applications with the noted emissions configurations.

This part cross-references BBB Industries 8484 for the same application.

Common Idle Problems It May Address

• Unstable or fluctuating idle speed
• Engine stalling when coming to a stop
• High idle after startup or during warm-up
• Idle speed changes when accessories are switched on
• Rough idle caused by restricted or inconsistent airflow control

Installation Notes and Tips

Verify the connector style before installation; AC58 uses 2 blade terminals. Confirm the vehicle year, make, model, and emissions notes against the listed fitment before replacing the original valve. Inspect the throttle body and intake passages for carbon buildup, since deposits can affect idle control performance even after the valve is replaced.

Quality Assurance

Standard Ignition manufactures this idle air control valve with load testing and durable internal components to support consistent operation. The motor assembly and bearing design are intended to withstand contamination and maintain accurate pintle control over time.