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Home >> Chevrolet >> 2003 >> Tracker 2D Utility, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems >> Fuel Evaporative System >> EVAP Canister Purge System

EVAP Canister Purge System

NOTE: Perform a careful visual inspection of the EVAP control system components and connecting hoses before diagnosis of an EVAP system malfunction. EVAP canister purge system does not perform purging unless engine is sufficiently warmed up and HO2S is fully activated.
  1. Allow engine to cool to room temperature.
  2. Start engine.
  3. Disconnect purge hose from EVAP canister. See Figure.
  4. Place a finger against the end of the disconnected hose and check for vacuum. Vacuum should not be felt when engine coolant temperature is less than normal operating temperature.
  5. Connect purge hose to EVAP canister and warm engine up to a normal operating temperature.
  6. Disconnect purge hose from EVAP canister.
  7. Place a finger over the disconnected hose and check for vacuum. Vacuum should be felt with engine running at a normal operating temperature and at 1500 RPM.
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