r/FordFlex

I went to start the Flex today and it was running rough. I popped the hood open and found a bunch of leaves and other junk that wasn’t there a couple of days ago. Just as I was blowing that out and hoping there wasn’t something living in the engine bay, a darn rat popped its head up at me. I evicted the darn thing and will have to do something to prevent this in the future, but now I need to find the source of that rough idle. There’s no codes or lights, just the rough idle and I don’t see anything obvious. Any ideas where to start? Thanks!

2016 N.A. btw