Inspection Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Do not perform this procedure unless instructed by an evaporative emission (EVAP) diagnostic.

Turn OFF the ignition.
Remove the EVAP canister purge valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
Lightly tap the EVAP canister purge valve on a clean hard surface.
Inspect for carbon particles exiting either of the vacuum ports.
- If no carbon particles are found reinstall the EVAP canister purge valve and continue with the EVAP cleaning procedure. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
- If carbon particles are found during the inspection procedure, replace the EVAP canister purge valve and continue with the EVAP cleaning procedure. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
- If you were instructed to replace the EVAP canister purge valve, and no carbon particles are found, return to the EVAP diagnostic procedure. Do not perform the EVAP cleaning procedure.