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Poor Fuel Fill Quality

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
• Fuel fill limiter vent valve stuck closed

• Evaporative emission (EVAP) canister restricted

• EVAP vent valve stuck closed

• Hose between canister and canister vent solenoid twisted or kinked if applicable

• High fuel temperature

• Fuel filler hose is kinked

• Faulty dispensing nozzle

• Ignition switch ON, vent valve closed


Over fill
• Fill limiter vent valve stuck open or leaking

• Fuel inlet check valve stuck open


Pre-mature shut-off of the fuel dispensing nozzle occurs immediately after engaging dispensing nozzle, tank empty
• Restricted vapor lines or fuel fill pipe

• High fuel temperature

• Inlet check valve at tank stuck closed, fill pipe full of fuel

• Fuel tank full, gauge not accurate


Pre-mature shut-off of the fuel dispensing nozzle, more than 1/8 of tank capacity dispensed
• Kinked, pinched or plugged lines in fuel tank vent system

• EVAP vent valve stuck closed or restricted

• EVAP canister restricted

• Fuel limiting vent valve stuck closed or obstruction at top of fuel tank


Fuel Spitback
• Restricted EVAP canister

• High fuel temperature

• Ignition switch ON, EVAP vent valve closed