Evaporative Emissions System: Testing and Inspection

Evaporative Emission System Leak Test





1. Disconnect the EVAP canister purge valve from the intake manifold fitting.





2. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

3. Disconnect the natural vacuum leak detection module hose from the EVAP canister.





4. Connect the VACUTEC Smoke Machine Fuel EVAP Emissions System Tester to the fresh air inlet of the EVAP canister. For additional information, refer to the manufacturer's instructions.





5. NOTE: The supplemental refueling adapter is located in the luggage compartment.

Install the supplemental refueling adapter into the Easy Fuel(TM) (capless) fuel tank filler pipe assembly.

6. Introduce smoke from the VACUTEC Smoke Machine Fuel EVAP Emissions System Tester into the EVAP system and verify that smoke is exiting the fuel tank filler pipe neck area. For additional information, refer to the manufacturer's instructions.

7. Remove the supplemental refueling adapter once smoke is observed exiting the fuel tank filler pipe neck area.

8. Continue to enter smoke into the system for 60 seconds to obtain pressure.

9. Press and release the remote start button in intervals of 15 seconds ON and 15 seconds OFF while checking for exiting smoke.

10. Use the halogen light provided with the VACUTEC Smoke Machine Fuel EVAP Emissions System Tester to follow the EVAP system path and look for smoke exiting at the source of the leak(s).

11. Repair any leaks as necessary.
- If smoke is observed at the disconnected end of the EVAP canister purge valve, replace the purge valve.

- If smoke is observed at the capless fuel fill insert, replace the fuel filler pipe assembly.

- If smoke is observed at a joint, disconnect and reconnect the components.
- If smoke is still observed at the joint, replace both components that make up the joint.

12. Repeat the leak check until the system passes.

13. NOTE: If a leak is still suspected, replace the natural vacuum leak detection module and fresh air hose assemblies.

Connect the natural vacuum leak detection module hose to the EVAP canister.

14. Connect the EVAP canister purge valve to the intake manifold fitting.