Hi,
I had the same problem with my F150. I changed everything in the ignition system and then it turned out to be a faulty fuel injector. Problem only occurred at highway speeds.
Art
rick wrote:
Between 60 and 80 mph there is a slight miss, or hesitation, and a
> small blip (increase) in the tachometer. This only happens after on
> hwy for awhile. 2 of the oxy sensors just changed, new plugs and
> wires. Any suggestions?