Standard Ignition AC2 Idle Air Control Valve

Idle Air Control Valve for GM V8 Applications

Standard Ignition AC2 is an idle air control valve for select Chevrolet and Pontiac vehicles from 1982-1984. It is built to regulate bypass airflow at idle so the engine can maintain a stable idle speed under changing load conditions.

Key Features

• Square connector shape for the listed applications
• 4-terminal electrical connection
• Gaskets included for installation on the specified vehicles
• Polymer-blended, isotropic neodymium/iron/boron magnet for precise pintle movement
• High-strength stepping motor for controlled airflow response
• Shielded ball bearing helps resist environmental contamination
• Load-tested actuator for added durability and consistent operation

Detailed Description

Standard Ignition AC2 is engineered for accurate idle air control on vehicles such as the 1982-1984 Chevrolet Caprice, 1982-1984 Chevrolet Impala, 1982-1984 Chevrolet Monte Carlo, 1982-1984 Chevrolet El Camino, 1982-1983 Chevrolet Camaro, 1982-1983 Chevrolet Malibu, 1982-1984 Chevrolet Corvette, 1983 Pontiac Bonneville, 1982-1983 Pontiac Firebird, 1982-1983 Pontiac Grand LeMans, 1983 Pontiac Grand Prix, and 1982-1983 Pontiac Parisienne. The motor and pintle design are built to deliver controlled airflow at idle, helping the engine respond properly when accessories, temperature, or load change. This part cross-references Standard Ignition AC101 for the same application.

What It Helps Correct

• Unstable or fluctuating idle speed
• Idle speed that drops too low when loads are added
• Idle control issues after throttle body service
• Airflow regulation problems caused by a worn IAC valve
• Driveability concerns related to inconsistent idle control

Installation Notes and Tips

Verify the square connector and 4-terminal layout before installation. Clean the mounting surface and inspect the gasket sealing area so the valve seats properly. Confirm the vehicle application against the listed fitment for Chevrolet Caprice, Corvette, El Camino, Impala, Monte Carlo, Camaro, Malibu, and Pontiac Bonneville, Firebird, Grand LeMans, Grand Prix, and Parisienne.

Quality Assurance

Standard Ignition manufactures this idle air control valve with high-grade materials and load-tested components to support long service life and consistent performance. The design uses a shielded ball bearing to help resist contamination in demanding engine-bay conditions.