I just recently had this problem too and it was the fuel pump. You should get a shop to run diagnostics to make sure though.

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05 Ranger Edge 3.0 v6
MODS: T-Bar Crank, 31x10.5x15 BFG AT KO1s, Pro Comp Series 51 wheels, Flowmaster 40 series, 30% Window Tint, Aftermarket stereo