My truck starts fine then after warming up and during exceleration dies out. wont start for couple minutes then fires up hard runs and repeats. started out doing it maybe once a day,now after warm up. Electrical?

 

Start with a tune-up...new plugs, wires, cap and rotor.

If that does nothing for you, then come on back. We will need to look at other things.

 

Welcome to F-150 Forums! Has the fuel filter been changed lately?

 

As Bob mentioned, fuel filter is definitely a possibility.