Fuel filter connectors - Ford F150 Forum Jul 26, 2010OK. I have the PITA fuel filter connector, This is the third time the fuel filter will be changed in total. With mine it doesn't matter how, when, why but they have to be pressured on until the little connector "Teeth" that are inside it are physically completely destroyed and mangled and the connector pried off.(Advance Auto sells these little "Teeth" in packages in the "Help" section) Even 5 6.7 Powerstroke Fuel Filter Connector (2017+) | Accurate 6 Ford Powerstroke. 2017+ Fuel Return Line Repair Connector. Were you changing your secondary (engine compartment mounted) fuel filter when you accidentally made just the wrong move and snapped the fragile return fuel line from the injectors (HC3Z-9A564-A) where it connects to the quick connect at the fuel filter?