bigblktruk

98 F150 4.6, 130,000 miles. Hello fellow F150 owners, been awhile since I have been on here I guess that's good means I haven't had any troubles out of my truck, but a couple of weeks my CEL came on, on the way to work, it started running rough, I drove it on to work just a couple of miles, by the time I got to work it was making this horrible sound, I hooked up the ODB scanner and it showed a misfire on cylinder 4, so I had it towed home, didn't want to do anymore damge, I wonder if anyone knows what is going on here, I uploaded a video of the sound, it seems to be coming from the top part of the engine on the passenger side, it was dark when I recorded this since I work from dusk to dark, any help would most certainly be appreciated, thanks Mike