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Home >> Chevrolet >> 2002 >> Express 1/2 Ton Van V6-4.3L VIN W >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Evaporative Emissions System >> Service and Repair >> General Information
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General Information

TOOLS REQUIRED
J41413 EVAP Pressure/Purge Diagnostic Station

INSPECTION PROCEDURE

NOTE: Use the 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 the EVAP system.

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

1. Turn OFF the ignition.
2. Remove the EVAP canister purge valve.
3. Lightly tap the EVAP canister purge valve on a clean hard surface.
4. 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.
^ If carbon particles are found during the inspection procedure, continue with the EVAP cleaning procedure.
^ 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.
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