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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 234 (Engine Control System & Engine Component Tests - 2.2L) >> Emission Systems & Sub-Systems >> Evaporative Emission System Cleaning >> Cleaning Procedures

Cleaning Procedures

WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support vehicle. Remove EVAP canister.
  2. Turn off main valve on EVAP Pressure/Purge Diagnostic Station (J-41413).
  3. Disconnect hose from diagnostic station pressure regulator.
  4. Using a section of vacuum hose, connect one end onto diagnostic station pressure regulator.
  5. Connect other end of vacuum hose to canister side of purge pipe.
  6. Turn on main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
  7. If nitrogen does not dislodge carbon particles, replace purge pipe.
  8. Return EVAP pressure/purge diagnostic station to original condition of station.
  9. Install a new EVAP canister.
  10. Connect all previously disconnected EVAP pipe connectors.
  11. Lower vehicle.
  12. Return to appropriate DTC service procedure.
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