EVAP Purge Valve

This procedure covers replacement of the EVAP purge valve on the 2011-2014 Ford F-150 with 5.0L V8 Coyote engine, which controls fuel vapor flow from the charcoal canister to the intake manifold.

Warnings

Tools required

Parts

• EVAP purge valve (canister purge valve) × 1 — Motorcraft CX2471 or equivalent

Preparation

1. Park vehicle on level ground and apply parking brake
2. Allow engine to cool completely if recently operated
3. Turn ignition to OFF position and remove key
4. Open hood and secure with prop rod

Procedure

1. 1

   Locate the EVAP purge valve
   The EVAP purge valve is mounted on the driver's side of the engine, near the firewall behind the intake manifold. It is a cylindrical valve approximately 3 inches long with electrical connector on top and two vapor hoses connected to it. Use a flashlight to identify its location before beginning removal.
2. 2

   Disconnect electrical connector
   Press down on the locking tab of the electrical connector on top of the purge valve while pulling the connector straight up and away from the valve. The connector may be stiff; use a gentle rocking motion if needed but do not pull on the wiring harness itself.
3. 3

   Disconnect vacuum/vapor hoses
   The purge valve has two hoses: one from the intake manifold (smaller vacuum hose) and one from the EVAP canister (larger vapor hose). Depress the quick-connect release tabs on each hose fitting and pull the hoses straight off the valve ports. Note the orientation of each hose for proper reconnection.
4. 4

   Remove purge valve mounting bolt
   Using a 10mm socket, remove the single mounting bolt securing the purge valve bracket to the engine. The valve is mounted to a bracket that attaches to the intake manifold area. Support the valve with your free hand to prevent it from falling once the bolt is removed.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
5. 5

   Remove old purge valve
   Pull the purge valve and bracket assembly away from the mounting location. The valve may be snapped into the bracket or secured with a separate clip. If the valve is separate from the bracket, note the orientation and remove it from the bracket. Inspect the mounting area for any debris or damage.
6. 6

   Inspect hoses and fittings
   Examine both vapor hoses for cracks, deterioration, or damage. Check the quick-connect fittings for broken tabs or wear. Inspect the valve ports on the intake manifold and canister line for debris or damage. Clean any dirt from the fittings using a clean shop towel.
7. 7

   Install new purge valve in bracket
   If your valve came separate from the bracket, install the new purge valve into the existing bracket, ensuring it clicks fully into place or is properly secured with any retaining clip. Verify the valve is oriented with the electrical connector facing upward and hose ports accessible.
8. 8

   Install purge valve assembly
   Position the purge valve and bracket assembly in the mounting location on the engine. Insert the mounting bolt and thread it by hand first to ensure proper alignment. Using a torque wrench and 10mm socket, tighten the mounting bolt to specification.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
9. 9

   Reconnect vapor hoses
   Push each vapor hose onto its corresponding port on the purge valve until you hear or feel a distinct click. The smaller vacuum hose connects to the port facing the intake manifold, and the larger vapor hose connects to the port facing toward the driver's side fender. Pull gently on each hose to verify it is locked in place.
10. 10

    Reconnect electrical connector
    Align the electrical connector with the pins on top of the purge valve and push straight down until the locking tab clicks into place. Gently tug on the connector to ensure it is fully seated and locked.

Reassembly

1. No additional reassembly required beyond steps above
2. Ensure all hose connections are secure and electrical connector is fully locked

Verification

• Start the engine and allow it to idle. Listen for any vacuum leaks or hissing sounds near the purge valve area
• Rev engine slightly and verify no hoses come loose or show signs of leakage
• Use a scan tool to clear any stored EVAP trouble codes (P0441, P0443, P0455, etc.)
• Drive vehicle for 10-15 minutes through varied conditions to allow the PCM to test the EVAP system
• Re-scan for codes to verify no EVAP-related codes return. The purge valve should operate silently during normal driving
• If Check Engine Light returns with EVAP codes, verify all hose connections are secure and electrical connector is properly seated

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