Dorman 994-056 Vapor Canister Purge Valve

Overview of Dorman Vapor Canister Purge Valve 994-056

The Dorman Vapor Canister Purge Valve 994-056 is designed to regulate fuel vapor flow in the evaporative emission control system. This component is compatible with Jeep and Ram vehicles, including Jeep Wagoneer and Ram 1500, 1500 Classic, and 4000 models, ensuring proper emission control and engine performance.

• Connector hose inside diameter: 8 mm
• Blade terminal type with 2 male terminals
• Single female rectangular connector
• Plastic housing for durability and corrosion resistance
• Two ports with outside diameters of 12.7 mm and 11.2 mm
• Inlet inside diameter of 7.5 mm
• Length of 160 mm
• Includes one purge valve per package

Technical Details and Specifications

This vapor canister purge valve features a plastic housing that provides resistance to heat and chemical exposure common in the engine bay. The valve includes a single rectangular female connector with two male blade terminals, designed for secure electrical connection. The connector hose inside diameter measures 8 mm, while the inlet inside diameter is 7.5 mm, allowing precise control of vapor flow. The valve has two ports with outside diameters of 12.7 mm and 11.2 mm, facilitating proper integration with the evaporative system hoses. Measuring 160 mm in length, this valve fits the specified Jeep and Ram models without modification.

Compatible Vehicles and Applications

This Dorman purge valve 994-056 is compatible with the following vehicles:

• Jeep Wagoneer
• Ram 1500 and 1500 Classic
• Ram 4000

It is designed to replace faulty or worn purge valves in the evaporative emission control system, helping maintain emission standards and engine efficiency.

Common Issues Addressed by This Purge Valve

• Check engine light triggered by purge valve malfunction
• Rough idling or engine hesitation due to improper vapor flow
• Failed emissions tests related to evaporative system leaks
• Fuel odor caused by vapor canister leaks
• Reduced fuel efficiency linked to purge valve failure

Installation Notes and Tips

When installing the Dorman 994-056 purge valve, ensure the electrical connector is securely attached to avoid intermittent connection issues. Verify hose diameters match the valve ports (12.7 mm and 11.2 mm outside diameter) for a proper seal. No mounting hardware is included, so use existing brackets or hardware from the original part. Inspect surrounding hoses and connectors for wear during replacement to prevent future leaks.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit and function. The 994-056 purge valve undergoes quality control testing to ensure reliable operation within the evaporative emission system. Warranty coverage details should be confirmed at the point of purchase, as they may vary.