A4 MONITOR THE FTP WHILE FILLING THE FUEL TANK WITH THE EVAP SYSTEM DISCONNECTED
NOTE: During normal fuel fill the Fuel Tank Pressure (FTP) Sensor value starts at 2.6 volts and will increase .3 to .7 of a volt from its starting point.
Monitor the FTP reference value while filling the fuel tank. Refer to ENGINE CONTROLS - INTRODUCTION (EXCEPT DIESEL & HYBRID) .
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.
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.
GENERAL PROCEDURES > FUEL SYSTEM PRESSURE CHECK
Special Tool(s) / General Equipment
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.