TRIPOWER1

i was driving at about 70mph and i was going to speed up @ about 75 the car just shudder for about a second and it went away once i passed 75. i slowed down to about 65 and was working my way back to 75 and it didit again i was worried so i cruised @ 65 and than i went back to 75-80 and no problem. when i got closer to my house i got on the hard and no problem. sign of a coil? fuel pump? i have a new opti plugs and wires.