Both,

I can fell a pronounced slight repetative shudder. I am wondering if it needs a valve adjustment as this can be the case. There is no CEL and it is minor but I can feel it.

I don't seem to notice it under hard acceleration.

My 02 Pathfinder was smooth as butter at idle.

I will mention it on it's first service but I doubt they will even try to look for it. It could run like crap and as long as the CEL isn't on they will not care. I hate issues like this because they will never do anything about it until it is major.

If I get crazy I may look at each plug and run a compression check.

Like I said, it is minor but I want my new truck running perfect.

Cheers