EVAP Purge Valve

This procedure replaces the EVAP purge valve on a 2015-2020 Ford F-150 with the 5.0L Coyote V8 engine, which controls the flow of fuel vapors from the charcoal canister to the intake manifold.

Warnings

Tools required

Parts

• EVAP purge valve × 1 — Use OEM Ford part or equivalent

Preparation

1. Ensure engine is completely cool
2. Park vehicle on level ground and engage parking brake
3. Open hood and secure with prop rod
4. Locate the EVAP purge valve on the driver's side of the engine, mounted near the firewall below the intake manifold

Procedure

1. 1

   Disconnect battery negative terminal
   Using a 10mm socket, loosen and disconnect the negative battery terminal. Move the cable away from the battery post to prevent accidental reconnection during the repair.
2. 2

   Access the EVAP purge valve
   The purge valve is located on the driver's side of the engine near the firewall, below the intake manifold. It may be necessary to remove any plastic engine covers or move wiring harnesses aside for better access. The valve is a cylindrical component with two hose connections and an electrical connector.
3. 3

   Disconnect electrical connector
   Press the tab on the electrical connector and pull it straight off the purge valve. If the connector is stuck, gently wiggle it while pulling. Do not pull on the wiring itself.
4. 4

   Disconnect vapor hoses
   The purge valve has two vapor hoses connected: one from the charcoal canister and one to the intake manifold. Press the quick-disconnect tabs on each hose fitting and pull the hoses straight off the valve. If equipped with spring clamps, use pliers to compress the clamp and slide it back on the hose before removing. Note the orientation of each hose connection for reinstallation.
5. 5

   Remove purge valve mounting
   The purge valve is typically held by a single mounting bracket. Using a 10mm socket, remove the mounting bolt or bracket that secures the valve to the engine or firewall. Keep the mounting hardware for reinstallation.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
6. 6

   Remove old purge valve
   Pull the purge valve out of its mounting location. Inspect the mounting bracket and hose connections for damage or cracks. Check that the hoses are in good condition and not cracked or deteriorated.
7. 7

   Install new purge valve
   Position the new purge valve in the mounting bracket, ensuring it is oriented the same way as the original valve. The valve has directional flow markings (usually arrows) that should align with the hose routing from canister to intake.
8. 8

   Secure mounting bracket
   Install the mounting bolt or bracket and hand-tighten first to ensure proper alignment. Then torque the mounting bolt to specification using a torque wrench.
   Torque spec

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

   Reconnect vapor hoses
   Push each vapor hose onto the correct port on the purge valve until you hear or feel a click, indicating the quick-disconnect fitting has locked. If equipped with spring clamps, slide them back into position over the hose connection. Gently tug on each hose to verify secure connection.
10. 10

    Reconnect electrical connector
    Push the electrical connector onto the purge valve until it clicks into place. Ensure the locking tab is fully engaged. Gently tug on the connector to verify it is secure.
11. 11

    Reinstall any removed components
    Reinstall any engine covers, wiring harnesses, or other components that were moved or removed for access. Ensure all clips and fasteners are properly secured.
12. 12

    Reconnect battery
    Reconnect the negative battery terminal and tighten the nut with a 10mm socket. Ensure the connection is secure.

Reassembly

1. Verify all hose connections are secure and properly seated
2. Ensure the electrical connector is fully locked onto the purge valve
3. Double-check that all wiring and components are clear of moving parts and heat sources
4. Close the hood

Verification

• Start the engine and verify it idles normally without rough running or check engine light
• Listen for vacuum leaks around the purge valve and hose connections
• Allow the vehicle to reach operating temperature and verify no EVAP-related diagnostic trouble codes are present
• Test drive the vehicle and monitor for any driveability issues or check engine light illumination
• After driving, use a scan tool to verify the purge valve is operating correctly when commanded by the PCM

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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