ACDelco 217426 Fuel Injection Idle Air Control Valve (IAC)

The ACDelco 217426 is a Fuel Injection Idle Air Control (IAC) Valve designed as a high-quality replacement for GM and select other vehicles. The IAC valve plays a critical role in engine management by regulating idle speed under varying load conditions, ensuring smooth, stable operation whether the engine is cold, warming up, or under accessory load.

How It Works:

The IAC valve is an electronically actuated device controlled by the vehicle's Engine Control Unit (ECU). It works by metering the amount of air that bypasses the closed throttle plate at idle, allowing the ECU to precisely maintain the correct idle RPM regardless of engine load changes—such as when the air conditioning, power steering, or electrical accessories are engaged.

Key Features:

• Direct-fit replacement engineered to match original equipment specifications for fit, form, and function
• Electronically actuated valve precisely regulates bypass airflow past the closed throttle plate
• Backed by General Motors and manufactured to ACDelco Gold (Professional) quality standards
• Helps prevent rough idle, stalling, and erratic RPM fluctuations
• Designed for reliable, long-term durability under normal operating conditions
• Compatible with GM vehicles and select additional makes and models

The ACDelco 217426 is part of ACDelco's Gold (Professional) line—a high-quality alternative to OE parts that meets the same rigorous performance and durability standards set by General Motors. It is sold as a single unit.