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Home >> Ford >> 2012 >> Flex SEL, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Evaporative Emissions System >> General Procedures >> Evaporative Emission System Leak Test >> Phase 2 - System Leak Check

Phase 2 - System Leak Check

3.5L vehicles 

  1. Disconnect the upper vapor tube-to-EVAP canister purge valve quick connect coupling. For additional information, refer to FUEL SYSTEM - GENERAL INFORMATION .
  2. Connect the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to the upper EVAP canister purge valve fitting. For additional information, manufacturer's instructions.

3.5L Gasoline Turbocharged Direct Injection (GTDI) vehicles 

  1. Disconnect the EVAP canister purge valve-to-vapor tube quick connect coupling. For additional information, refer to FUEL SYSTEM - GENERAL INFORMATION .
  2. Connect the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to the fuel vapor tube. For additional information, manufacturer's instructions.

All vehicles 

  1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING & LIFTING .
    2. NOTE: The battery ground cable was previously disconnected in the vapor tube quick connect coupling disconnect procedure.
  2. Connect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES .

3.5L vehicles 

    NOTE: In the scan tool, the EVAP canister purge valve is referred to as the EVAP vapor management valve.
  1. Open the EVAP canister purge valve with the scan tool.

All vehicles 

  1. Close the canister vent solenoid with the scan tool.
    2. NOTE: The supplemental refueling adaptor is located in the spare tire compartment.
  2. Install the supplemental refueling adapter into the Easy Fuel™ (capless) fuel tank filler pipe assembly.
    3. NOTE: If smoke does not exit the fuel tank filler pipe neck area after the system is pressurized, open the canister vent solenoid with the scan tool to allow the air to purge. Once smoke is seen at the canister vent solenoid, close the canister vent solenoid with the scan tool.
  3. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester into the EVAP system and verify that smoke is exiting the fuel tank filler pipe neck area. For additional information, manufacturer's instructions.
  4. Remove the supplemental refueling adapter once smoke is observed exiting the fuel tank filler pipe neck area.
  5. Continue to enter smoke into the system for 60 seconds to obtain pressure.
  6. Press and release the remote start button in intervals of 15 seconds ON and 15 seconds OFF while checking for exiting smoke.
  7. Use the halogen light provided with the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to follow the EVAP system path and look for smoke exiting at the source of the leak(s).
  8. Repair any leaks as necessary.
  9. Repeat the leak test until the system passes.
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