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Home >> Pontiac >> 2004 >> Aztek Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.4L (Troubleshooting & Diagnosis) >> Troubleshooting >> Poor Fuel Fill Quality

Poor Fuel Fill Quality

Poor Fuel Fill Quality

Condition Cause
Definition: During the fueling process a continual, occasional or no fuel nozzle shut-off condition has occurred.
Preliminary Perform the Diagnostic System Check - Engine Controls .
Occasional shut-off of the fuel dispensing nozzle
  • Fill limiter vent valve stuck closed
  • Restricted evaporative emission (EVAP) canister
  • EVAP vent valve stuck closed.
  • High Reid vapor pressure or high fuel temperature
  • Fuel filler hose is pinched or kinked.
Continual shut-off of the fuel dispensing nozzle
  • Fill limiter vent valve stuck closed
  • EVAP canister blocked
  • EVAP vent valve stuck closed
  • Restricted or pinched EVAP vapor lines
  • Blocked fuel filler hose/pipe or fuel fill check valve
No nozzle shut-off/Over fill
  • Pressure relief valve is stuck open or leaking.
  • Fill limiter vent valve is stuck open or leaking.