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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Control System - 4.3L (Troubleshooting & Diagnosis)) >> Troubleshooting >> Poor Fuel Fill Quality

Poor Fuel Fill Quality

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Poor Fuel Fill Quality

Problem Causes
Definition: During the fueling process a continual, occasional or no fuel nozzle shut-off condition has occurred.
Difficult to fill
  • Fill limiter vent valve stuck closed
  • Evaporative emission (EVAP) canister restricted
  • EVAP vent valve stuck closed
  • Restricted vapor lines
  • High Reid vapor pressure or high fuel temperature
  • Fuel filler hose is pinched or kinked
  • Ignition switch ON, Vent Valve Closed
Over fill
  • Pressure relief valve is stuck open or leaking
  • Fill limiter vent valve stuck open or leaking
Pre-mature shut-off of the fuel dispensing nozzle
  • Fill limiter vent valve stuck closed
  • EVAP canister restricted
  • EVAP vent valve stuck closed
  • Restricted vapor lines
  • High Reid vapor pressure or high fuel temperature
  • Ignition switch ON, EVAP vent valve closed
Fuel Spitback
  • Restricted EVAP canister
  • High Reid vapor pressure or high fuel temperature
  • Ignition switch ON, EVAP vent valve closed