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Home >> Ford >> 2019 >> Flex SE >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System General Information >> Diagnosis And Testing >> Fuel System >> Symptom Chart: Fuel System
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Symptom Chart: Fuel System

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. DIAGNOSTIC METHODS for information regarding Ford-specific diagnostic practices.

NOTE: Refer to the Description and Operation, Intelligent Access with Push Button Start. REFER to DIAGNOSIS AND TESTING (INTELLIGENT ACCESS WITH PUSH BUTTON START) to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON and ignition START) on vehicles with this feature.
Condition Possible Sources Actions
Slow to fill 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)
Fuel system fresh air inlet
GO to Pinpoint Test A .
All other fuel system concerns Fuel system components REFER to the PC/ED service information.