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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 253 (Engine Controls - System & Component Tests - 2.2L) >> Emission Systems & Sub-Systems >> Evaporative Emission System Cleaning >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the EVAP Pressure/Purge Diagnostic Station (J 41413), or equivalent, to provide a clean, dry, low pressure gas source. Do not substitute any other pressurized gas source. Damage may result to the EVAP system.
  1. Turn ignition switch to OFF position.
  2. Remove the EVAP canister purge valve.
  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 diagnostic procedure.
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