13 F150...having a little bit of what I thought was a rough idle. Trips to the dealer and everything checked fine when hooked up to a computer to monitor engine profile...drove a 14 with a 5.0 brand new and also felt it. Characteristic of the engine I guess.

Cleaned and regapped plugs to try and smooth things out. All were in spec on the high side---right around .54ish. Took them down to around .50...nothing crazy changed.

I did want to post this to get thoughts. Still working fine, but this is at 20k...a concern? This was the #6 or #7 cylinder. Cleaned them and they are back in...truck running fine. Just wanted to get observations from the forum as I'm not a spark plug savant.

 

Looks normal.

 

Normal as long as they all look like that lol