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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems (Gasoline) >> Evaporative Emission System Cleaning >> Inspection Procedure
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Inspection Procedure

NOTE: DO NOT perform this procedure unless instructed by EVAP diagnostic test.
NOTE: Use EVAP Pressure/Purge Diagnostic Station (J 41413) in order to provide a clean, dry, low pressure gas source. DO NOT substitute any other pressurized gas source. Damage may result to EVAP system.
  1. Turn OFF the ignition.
  2. Remove EVAP canister purge valve.
  3. Lightly tap EVAP canister purge valve on a hard surface.
  4. Inspect for carbon particles exiting either vacuum port.
    • If no carbon particles were detected, install original EVAP canister purge valve and continue with cleaning procedure.
    • If carbon particles are found during inspection procedure, replace EVAP canister purge valve and continue with cleaning procedure.
    • If you were instructed to replace EVAP canister purge valve and no carbon particles are found, return to EVAP diagnostic procedure that directed you here. DO NOT perform EVAP cleaning procedure.
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