fuel
EVAP Purge Valve
for 2021 Ford F-150 3.5L V6 EcoBoost · 4WD
Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Lexus & Toyota Mechanic · 20+ years
Difficulty
Easy
Time
1.0 h
Tools
5
Steps
12
✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.
Replace the EVAP purge valve, which controls the flow of fuel vapors from the charcoal canister to the intake manifold for emissions control.
Warnings
⚠Engine must be cool to touch before beginning work
⚠Fuel vapors may be present in EVAP system lines; work in well-ventilated area
ℹ️Do not disconnect battery as this will erase stored EVAP system readiness monitors
Tools required
10mm socket and ratchetEssential
Panel trim removal tool
Pick tool or small flat screwdriver
Shop towelsEssential
Torque wrenchEssential
Parts
- EVAP purge valve × 1 — Use OEM specification
Preparation
- Park vehicle on level surface and set parking brake
- Allow engine to cool completely if recently operated
- Turn ignition to OFF position
- Gather all tools and replacement parts
Procedure
- 1Locate EVAP purge valveOpen hood and secure with prop rod. The EVAP purge valve is located on the driver side of the engine bay, mounted to a bracket near the firewall above the transmission bellhousing area. It is a cylindrical solenoid valve with two vapor hoses and one electrical connector.
- 2Disconnect electrical connectorPress the locking tab on the electrical connector and pull straight off the purge valve. Do not pull on the wiring harness; grasp the connector body only.
- 3Remove inlet vapor hoseLocate the vapor hose coming from the charcoal canister (lower connection). Press the quick-disconnect tabs on both sides of the fitting and pull the hose straight off the valve. You may hear a slight hissing sound as residual vapor pressure equalizes.⚠Fuel vapor odor is normal when disconnecting EVAP lines
- 4Remove outlet vapor hoseLocate the vapor hose going to the intake manifold (upper connection). Press the quick-disconnect tabs and pull the hose straight off the valve. Some resistance is normal on these fittings.
- 5Remove purge valve mounting boltUsing a 10mm socket, remove the single mounting bolt securing the purge valve to the bracket. Support the valve with your other hand to prevent it from falling.Torque specMounting Bolts31 Nm (23 lb-ft)
- 6Remove purge valve from bracketPull the purge valve away from the mounting bracket. Note the orientation of the valve and any alignment tabs or grooves for proper installation of the new valve.
- 7Inspect vapor hoses and fittingsExamine both vapor hose quick-disconnect fittings for damage, cracks, or debris. Check hoses for cracks, splits, or deterioration. Replace any damaged components. Clean the quick-disconnect fittings with a shop towel if dirty.
- 8Install new purge valve in bracketPosition the new EVAP purge valve in the mounting bracket, ensuring it is oriented the same way as the original (inlet port facing down toward canister line, outlet port facing up toward intake manifold). The valve should seat fully in the bracket.
- 9Install mounting boltInstall the mounting bolt and torque to specification using a torque wrench. Ensure the valve is properly seated in the bracket before final tightening.Torque specMounting Bolts31 Nm (23 lb-ft)
- 10Connect inlet vapor hosePush the lower vapor hose (from canister) onto the inlet port of the purge valve until you hear and feel a distinct click. Gently tug on the hose to verify it is fully locked.
- 11Connect outlet vapor hosePush the upper vapor hose (to intake manifold) onto the outlet port of the purge valve until you hear and feel a distinct click. Gently tug on the hose to verify it is fully locked.
- 12Connect electrical connectorPush the electrical connector onto the purge valve solenoid until it clicks into place. Ensure the locking tab is fully engaged and the connector cannot be pulled off without pressing the release tab.
Reassembly
- No disassembly of other components required for this procedure
Verification
- Start the engine and verify no unusual hissing sounds from the EVAP purge valve area
- Allow engine to reach operating temperature and verify smooth idle with no rough running
- Use a scan tool to verify no EVAP system diagnostic trouble codes are present
- Perform an EVAP system monitor drive cycle if needed to restore readiness monitors
- Verify no fuel vapor odors are present around the purge valve or hose connections