"I have 3 or 4 leaky fuel injector seals that I plan to replace this week. Could they be contributing to somewhat rough idle -- with the car continuously trying to adjust fuel/air mixture?"
Sounds plausible, but how do you know they are leaky?
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7