EVAP Purge Valve

This procedure replaces the EVAP purge valve on a 2015-2020 Ford F-150 with the 3.5L EcoBoost V6 engine, which controls fuel vapor flow from the charcoal canister to the intake manifold.

Warnings

Tools required

Parts

• EVAP purge valve × 1 — Motorcraft CX2444 or equivalent

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow engine to cool completely if recently operated
3. 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 bay, attached to a bracket near the firewall above the valve cover. It is a cylindrical black solenoid with two hose connections and an electrical connector.
2. 2

   Disconnect the electrical connector
   Press the locking tab on the electrical connector and pull straight away from the purge valve. Do not pull on the wiring harness itself, only the connector body.
3. 3

   Disconnect the intake manifold vacuum line
   Using a small flathead screwdriver or trim tool, compress the quick-connect retaining tabs on the upper vacuum line connection and pull the line straight off the purge valve nipple. This line runs to the intake manifold.
4. 4

   Disconnect the canister vent line
   Similarly, compress the retaining tabs on the lower hose connection (which runs to the charcoal canister) and pull the line straight off the purge valve. Inspect both hose ends for cracks or damage.
5. 5

   Remove the mounting bolt
   Using a 10mm socket, remove the single bolt securing the purge valve to its mounting bracket. The valve may now be removed from the engine bay.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
6. 6

   Inspect and clean mounting area
   Check the mounting bracket for damage or corrosion. Wipe away any debris or dirt from the mounting surface and hose connection points with a shop towel.
7. 7

   Install new EVAP purge valve
   Position the new purge valve into the mounting bracket, ensuring the hose nipples are oriented correctly (larger nipple typically faces down toward canister line). Install the mounting bolt and torque to specification.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
8. 8

   Reconnect vacuum and vent lines
   Push the intake manifold vacuum line onto the upper nipple until you hear/feel a click indicating the quick-connect has engaged. Push the canister vent line onto the lower nipple until it clicks. Gently tug on both lines to verify secure connection.
9. 9

   Reconnect electrical connector
   Align the electrical connector with the purge valve terminals and push firmly until the locking tab clicks into place. Ensure the connector is fully seated and cannot be pulled off easily.

Reassembly

1. Verify all hose connections are fully seated and secure
2. Ensure electrical connector locking tab is engaged
3. Double-check mounting bolt torque specification was met

Verification

• Start the engine and verify it runs smoothly with no rough idle
• Check for vacuum leaks by listening for hissing sounds near the purge valve area
• Use an OBD-II scanner to verify no EVAP system codes are present (P0441, P0443, P0455, etc.)
• Perform an EVAP system monitor drive cycle if required to clear previous codes: drive at highway speeds for 5-10 minutes, then allow engine to idle for 2 minutes
• Verify the purge valve clicks audibly when commanded on/off using a scan tool with active testing capability

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