Standard Ignition AC404 Idle Air Control Valve

Idle Air Control Valve for Toyota Fuel Injection

Standard Ignition AC404 is an idle air control valve for Toyota fuel injection systems that need stable idle regulation. It uses an oval connector shape, 3 terminals, and 2 hose connectors to match the specified application.

Key Features

• Idle air control valve for air and fuel delivery systems
• Oval connector shape for application-specific fitment
• 3-terminal electrical connection
• 2 hose connectors for the listed Toyota applications
• No gasket included

Detailed Description

Standard Ignition AC404 is built for Toyota idle speed control applications where the valve must regulate bypass air around the throttle body to maintain a steady idle. This part number AC404 is listed for 2000 Toyota 4Runner and 2000 Toyota Tacoma with Federal Emissions, plus 1996-1999 Toyota 4Runner, 1996-1999 Toyota Tacoma, and 1996-1998 Toyota T100. It cross-references Beck/Arnley 159-1027 for the same application.

For buyers searching for a Toyota 4Runner idle air control valve, Toyota Tacoma idle air control valve, or Toyota T100 idle air control valve, AC404 provides a direct-match replacement path based on the confirmed fitment data. The oval connector, 3 terminals, and dual hose connection layout are important details when matching the original component.

Common Issues This Part May Address

• Unstable or fluctuating idle speed
• Engine stalling at stoplights or during warm-up
• Idle speed that stays too high after throttle release
• Idle control response problems related to the fuel injection system
• Driveability concerns tied to air bypass regulation at idle

Installation Notes and Tips

Verify the connector shape, terminal count, and hose connection layout before installation. Because no gasket is included, inspect the sealing surface and replace any worn gasket material as needed during service. Confirm Federal Emissions fitment where noted for the 2000 Toyota 4Runner and 2000 Toyota Tacoma applications.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. AC404 is cataloged with application-specific fitment details to support accurate replacement selection for Toyota idle air control service.