Pinpoint Test A: Slow To Fill
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
Under normal operation, fuel should flow at a steady rate through the fuel tank filler pipe into the fuel tank. As fuel enters the fuel tank air is vented through the filler pipe or the ORVR system. REFER to: Fuel System - Overview .
Possible Sources
- Fuel tank filler pipe
- Fuel tank filler pipe vent tube, if equipped
- Evaporative emission system
- Fuel tank inlet check valve (part of the fuel tank)
- Fuel level vent valve (part of the fuel tank)
- A1 CHECK COMPONENTS FOR SIGNS OF DAMAGE
- Visually inspect the following components for signs of damage:
- Fuel tank filler pipe
- Fuel tank filler pipe vent tube, if equipped
- EVAP system
- Fuel tank inlet check valve (part of the fuel tank)
- Fuel level vent valve (part of the fuel tank)
Was the cause of the concern found?
Yes REPAIR or INSTALL new components to correct the concern. No GO to A2 - Visually inspect the following components for signs of damage:
- A2 CHECK THE SYSTEM FOR ANY EVAP (EVAPORATIVE EMISSION) DTC'S
- Connect the scan tool.
- Check the system for any EVAP DTC's.
Are any DTC's present?
Yes REFER to: Fuel Tank and Lines . No GO to A3 - A3 MONITOR THE FTP WHILE FILLING THE FUEL TANK
- Monitor the Fuel Tank Pressure (FTP) reference value while filling the fuel tank.
Access the PCM and monitor the FTP_V (V) PID
Is FTP within specification? REFER to: Specifications
Yes GO to A5 No GO to A4 - Monitor the Fuel Tank Pressure (FTP) reference value while filling the fuel tank.
- A4 MONITOR THE FTP WHILE FILLING THE FUEL TANK WITH THE EVAP SYSTEM DISCONNECTED
- Disconnect the fuel tank-to-EVAP canister quick connect coupling at the EVAP canister.
- Monitor the FTP reference value while filling the fuel tank.
Access the PCM and monitor the FTP_V (V) PID
Is FTP within specification?
Yes INSPECT the EVAP system for blockage or restrictions. REPAIR the blockage or restriction. If the blockage or restriction cannot be repaired, INSTALL new EVAP system components. No GO to A5 - A5 CHECK THE FUEL TANK FILLER PIPE ASSEMBLY FOR BLOCKAGE OR RESTRICTION
- Remove the fuel tank filler pipe assembly. REFER to: Fuel Tank Filler Pipe .
- Inspect the fuel tank filler pipe and fuel tank filler pipe vent tube (if equipped) for a blockage or restriction.
Is the fuel tank filler pipe or fuel tank filler pipe vent tube (if equipped) blocked or restricted?
Yes If possible, REPAIR the blockage or restriction. If the blockage or restriction cannot be repaired, INSTALL a new fuel tank filler pipe or fuel tank filler pipe vent tube. REFER to: Fuel Tank Filler Pipe . No GO to A6 - A6 CHECK THE FUEL TANK INLET CHECK VALVE
- Inspect the fuel tank inlet check valve for restriction or sticking.
Is the fuel tank inlet check valve restricted or sticking?
Yes If possible, REPAIR the restriction. If the restriction cannot be repaired, INSTALL a new fuel tank. REFER to: Fuel Tank . No INSTALL a new fuel tank. REFER to: Fuel Tank .