So after I start the truck (2005 Sequoia, ~230k miles), once I've driven about a mile+ there's a traffic light I always get. While I'm sitting there, it feels like a cylinder is randomly misfiring. It's not rhythmic and nothing bad happens (like a stall, etc.) - driving away, it doesn't do it anymore until the next time after starting cold and driving a mile. It's weird.

So I threw a scanner on it, even watched the datastream -- no misfires according to the cheapie Ancel scanner I have. But a misfire is what it feels like.

When I got the truck a few years ago with 210k miles on it, I noticed that two of the coilpacks were new. Should I go ahead and just replace the rest, I don't know if they are original. I'm thinking to replace the coilpacks and spark plugs to see what it does.

Suggestions, thanks!