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Standard Ignition AC421 Idle Air Control Valve
| Brand | Standard Ignition AC421 |
|---|---|
| Connector Shape | Rectangular |
| Gaskets Included | Yes |
| Hardware Included | No |
| Fits | Chrysler, Dodge, and Plymouth · 6 vehicles |
Accurate airflow control. Precision pintle control helps maintain smooth idle operation.
High-strength stepping motor. Delivers strong output torque for responsive actuator performance.
Shielded ball bearing. Helps resist contaminants for extended service life.
Cross-references HOLSTEIN 2IAC0033, Walker Exhaust 50556 and 2-166507 for the same application. See all 7.
Idle Air Control Valve for Neon Applications
Standard Ignition AC421 is an idle air control valve built for precise airflow management at the throttle body. It uses a rectangular 4-terminal connector, includes a gasket, and is engineered for stable idle control in select Chrysler, Dodge, and Plymouth Neon applications.
Key Features
- Rectangular connector shape for proper electrical connection
- 4-terminal design for vehicle-specific idle air control operation
- 1-port configuration for direct idle air passage control
- Gasket included for sealing at installation
- High-strength stepping motor for accurate pintle movement
- Shielded ball bearing helps resist environmental contamination
- Load-tested actuator for added durability and consistent performance
- Built with high-grade materials for extended service life
Detailed Description
Standard Ignition AC421 is an idle air control valve for 2000 Dodge Neon, 2000 Plymouth Neon, and 2001-2002 Chrysler Neon applications. This AC421 idle air control valve regulates bypass air to help maintain a steady idle during cold starts, accessory load changes, and stop-and-go driving. The internal stepping motor and magnet assembly are built for accurate pintle control, while the sealed bearing design helps protect the motor from contamination. This part cross-references Walker Exhaust 50556 for the same application.
What It Helps Solve
- Unstable or fluctuating idle speed
- Stalling when coming to a stop
- Rough idle during cold starts
- Idle speed changes when electrical loads increase
- Airflow control issues caused by a worn IAC valve
Installation Notes and Tips
Verify the rectangular connector, 4-terminal layout, and 1-port configuration before installation. Replace the gasket during service to help maintain a proper seal. Confirm vehicle application by year and model: Fits 2001-2002 Chrysler Neon, N/A; Fits 2000 Dodge Neon, N/A; Fits 2000 Plymouth Neon, N/A. The AC421 should be installed on a clean throttle body surface to support accurate idle control after replacement.
Quality Assurance
Standard Ignition manufactures this idle air control valve with load testing and durable internal components to support consistent operation and long service life. The AC421 is built to meet the demands of daily driving in select Neon applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | Chrysler | Neon | 2.0L | L4 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve |
| 2001 | Chrysler | Neon | 2.0L | L4 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve |
| 2000 | Dodge | Neon | 2.0L | L4 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve |
| 2000 | Dodge | Neon | 2.0L | L4 | N/A | Compatible with various car models. |
| 2000 | Plymouth | Neon | 2.0L | L4 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve |
| 2000 | Plymouth | Neon | 2.0L | L4 | N/A | Compatible with various car models. |
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