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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Removal & Installation >> Emission Systems & Sub-Systems >> EVAP System Cleaning >> Cleaning Procedure

Cleaning Procedure

  1. Remove EVAP canister. See EVAP CANISTER .
  2. Turn OFF the main valve on the Evaporative Emission System Tester (J 41413-200).
  3. Disconnect hose from the diagnostic station pressure regulator.
  4. Using a section of vacuum hose, connect one end to the diagnostic station pressure regulator.
  5. Connect the other end of the vacuum hose to the canister side of the purge pipe.
  6. Turn ON the main Nitrogen cylinder valve and continue to discharge Nitrogen for 15 seconds.
  7. If the Nitrogen does not dislodge the carbon particles, replace purge pipe.
  8. Return EVAP pressure/purge diagnostic station to original settings.
  9. Install a new EVAP canister.
  10. Connect all previously disconnected EVAP pipe connectors.
  11. Lower vehicle.
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