01-Focus - Intermitent Hesitation

New to forum .... can anyone help ... Car idles good, while driving it will hesitate and no power, but not all the time. No check engine light on. I replaced fuel pump and filter, then was told it was the coil, replaced that. Still the same, seems to be getting worse. Also replaced plugs and Air filter . Any help would be appreciated ... Thanks.

Back to square one ...... the coil I installed (used) started missing on # 2 Cyl. after about 2- weeks checked wire to plug with another but turns out to be a bad coil .... installed orginal coil and now car works fine at Idle, same as before put in gear with a little weight and it starts to mis-fire again .... could this mean both coils are bad ... or is there something that could burn the coil out . ..... any help would be appreciated ....Thanks.