I just fix my truck with a somewhat simular problem.
It took me forever to figure it out but the firing order on the damn thing was wrong.
If you say that it's your first ford then I'm guessing that you haven't had it long.
Look up a spark plug wiring diagram and see if the wires are running to the right pistons.
If that ain't the problem, talk to the y-man or Dr. Bowtie.
1993 F150 4x4 XLT
3" body, straight pipe cherry bomb, 33" thornbird tsl's, mickey thompson rims, 3/8" diamond plated back bumper, buillet grill, aftermarket headlight/blinker assembly, smoked tail lights.
Things to come-6" susp. lift, HID halo headlights, rhino bed spray too.