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Home >> Lexus >> 1994 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Fuel Evaporation >> EVAP Canister
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EVAP Canister

  1. Visually inspect EVAP canister and hoses for cracks and damage. See COMPONENT LOCATIONS  under INTRODUCTION. Disconnect all hoses from canister. Remove check valve (if equipped) from hose that is connected to bottom of canister. Connect a clean hose to fuel tank port (large diameter port) on top of canister. Blow 0.68 psi (0.05 kg/cm2 ) of air through clean hose. Air should flow from all other ports, including port(s) on bottom of canister.
  2. Blow air into canister purge port (small diameter port) on top of canister. If air flows from other ports, replace canister. If air does not flow from other ports, hold finger over purge port. Blow a maximum of 43 psi (3 kg/cm2 ) of compressed air through fuel tank port to clean canister filter. No charcoal should come out. DO NOT try to clean canister filter by washing canister.