Standard Ignition AC378 Idle Air Control Valve

Idle Air Control Valve for Toyota Fuel Injection

Standard Ignition AC378 is an idle air control valve for Toyota fuel injection systems that need stable idle speed management. It uses an oval connector shape, three hose connectors, and a three-terminal electrical connection for the specified applications.

Key Features

• Idle air control valve for fuel injection system service
• Oval connector shape for the listed Toyota applications
• 3 hose connectors and 3 terminals
• No gasket included
• Standard Ignition AC378 replacement part

Application Details

Standard Ignition AC378 is used on select 1994-1995 Toyota Camry and 1994-1995 Toyota Celica models with California emissions equipment. It also applies to auxiliary air valve configurations noted for those vehicles. This part number is referenced for Toyota Camry idle air control valve replacement and Toyota Celica auxiliary air valve service in California emissions applications.

This part cross-references SKF 29918 for the same application.

What It Helps Address

• Unstable or fluctuating idle speed
• Idle speed that is too high or too low
• Stalling at stops or during deceleration
• Air bypass control issues in the intake system
• Idle control faults on California emissions-equipped Toyota Camry and Toyota Celica models

Installation Notes and Tips

Verify the connector shape, terminal count, and hose connection layout before installation. Because no gasket is included, confirm the existing sealing components are serviceable or source the correct gasket separately. Match the vehicle’s emissions configuration and application notes to the catalog listing before replacing the valve.

Quality Assurance

Standard Ignition AC378 is built as a direct replacement part for the listed Toyota applications and follows the specified connector and hose-port configuration for proper fitment. Confirm part number AC378 against the vehicle identification and emissions setup before installation.