oldF-150guy

we have an '03 F-150 2wd 5.4L and had been doing really good with it for awhile. but yesterday we did an oil change with the usual royal purple oil that we had been putting in it. today on my way to work the truck was fine and on the way home it was fine it did jump up and down once on me at about 37-40 miles an hour didnt think anything about it. i did not run the truck hard did slow acceleration up to speed limit and that it nothing hard on it at all. but when it jumped well more like bounced up and down it felt like the rear or the suspension. didnt think anything of it. well dad goes to take the truck up tonight after sitting for a few hours and the check engine light is on and its idling rough and running funny hes says