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Home >> Buick >> 2005 >> LeSabre Limited, 4T65E/M15 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Evaporative Emission (EVAP) System Cleaning >> Inspection Procedure

Inspection Procedure

    IMPORTANT: Proceed with the following procedure only if referenced by a evaporative emission (EVAP) diagnostic or repair procedure.
  1. Turn OFF the ignition.
  2. Remove the EVAP canister purge solenoid valve. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement .
  3. Lightly tap the EVAP canister purge valve on a hard surface.
  4. Inspect for carbon particles exiting either of the vacuum ports.
    • If no carbon particles were detected, but a blockage was detected during a diagnostic procedure. Install the original EVAP canister purge valve and continue with the cleaning procedure.
    • If carbon particles are found during the inspection procedure. Replace the EVAP canister purge valve and continue with the cleaning procedure.
    • If a diagnostic procedure directed you to replace the EVAP canister purge valve and no carbon particles were detected. Replace the EVAP canister purge valve and return to the published service procedure.
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