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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems >> On Board Refueling Vapor Recovery System >> Strong Fuel Odor From EVAP Canister

Strong Fuel Odor From EVAP Canister

WARNING: When conducting tests around open fuel tanks and containers observe following:
  • Furnish work area with proper fire safety equipment.
  • DO NOT smoke.
  • Keep open flames and sparks away from work area.
CAUTION: Before removing fuel lines or hoses, perform following procedures:
  • Disconnect negative battery cable.
  • Release fuel pressure.
  • Place drained fuel into an explosion proof container and secure lid.
  • Always replace any "O" ring seals when removed.
  • Be careful to not twist or kink hoses or tube when they are installed.
  • To avoid damage to hoses, DO NOT overtighten hose clamps.
  • After repairs are completed, run vehicle and check for fuel leaks.
  • DO NOT continue to top off fuel tank after fuel pump nozzle automatically shuts off.
  1. Remove EVAP canister along with EVAP canister vent control valve. Weigh EVAP canister with vent valve attached. If EVAP canister weighs less than 4 lbs. (1.8 kg), go to next step. If canister weighs more than specified, go to step  3.
  2. If water drains from EVAP canister, go to next step. If no water drains from canister, go to step  6.
  3. Replace EVAP canister. After repairs, go to next step.
  4. Check water separator. See WATER SEPARATOR . If water separator test okay, go to next step. If water separator does not test okay, replace water separator.
  5. Check vacuum hose between EVAP canister and water separator for clogging or poor connections. If problem is found, replace vacuum hose. After repair, retest system.
    6. NOTE: Refueling EVAP vapor cut valve can only be replaced by replacing fuel tank.
  6. Check refueling EVAP vapor cut valve. See REFUELING EVAP VAPOR CUT VALVE . If no problem is found, go to next step. If problem is found, replace refueling EVAP vapor cut valve.
  7. Check refueling control valve. See REFUELING CONTROL VALVE . If no problem is found, testing is complete. If problem is found, replace refueling control valve.
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