Goss Idle Speed Control Valve IAC603 – Idle Air Control (IAC)

PRODUCT OVERVIEW

The Goss Idle Speed Control Valve IAC603 is an idle air control (IAC) valve designed to regulate engine idle speed in fuel-injected vehicles. It allows a controlled amount of air to bypass the closed throttle plate so the engine control module (ECM) can maintain a stable idle under varying operating conditions.

FUNCTION & OPERATION

The IAC valve is a key component of the engine management system. It responds to ECM input signals and adjusts airflow during:

• Cold start and engine warm-up
• Start-up and deceleration
• Increased electrical loads
• Air conditioning operation
• Automatic transmission engagement

By accurately metering bypass air, the IAC603 helps maintain a consistent, reliable idle speed across a wide range of operating conditions.

SYMPTOMS OF A FAULTY IAC VALVE

Replacing a worn or failed idle speed control valve can help resolve issues such as:

• Unstable or fluctuating idle speed
• Engine stalling at idle
• Engine failing to maintain idle

QUALITY & RELIABILITY

The Goss IAC603 idle air control valve is engineered as a high-quality aftermarket replacement. It is designed to fit and function like the original component and is manufactured to meet or exceed OEM performance standards.

PART DETAILS

• Part number: IAC603
• Component type: Idle Speed Control Valve / Idle Air Control Valve (IAC)
• Application: Engine management idle speed control in fuel-injected vehicles

Please check the compatibility or vehicle fitment information for your specific application before purchase.