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Home >> Honda >> 1983 >> Prelude Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Component Testing >> Charcoal Canister

Charcoal Canister

  1. Connect tachometer and warm engine to normal operating temperature. Remove fuel filler cap. Remove canister purge air hose from frame near canister and connect vacuum gauge. Run engine at 3500 RPM.
  2. Vacuum should appear on gauge within 1 minute. If not, disconnect vacuum gauge and reinstall fuel filler cap. Check charcoal canister for damage or defects. If defective, replace canister.
  3. If canister is okay, stop engine and disconnect PCV hose from canister. Connect vacuum pump to canister purge fitting and draw vacuum. Vacuum should remain steady. If vacuum drops, replace canister and retest.
  4. If vacuum remains steady, reconnect PCV hose to canister and start engine. Purge side vacuum should drop to zero. If not, replace canister and retest.
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