My car has had a stumbly rough idle since day dot and other than increasing the idle rpm by +50rpm in lemmiwinks which helped a little, its still an ongoing niggle. My fuel trims are spot on, plugs are new at 28 thou, no misfires under load so doubtful then at idle.
Two channels in Lemmiwinks seem to maybe offer some love. Apparently channel 13: control bits can be set to 'on' 'on' and also ch14: idle torque can be played with.
I'm not one to just set control bits without being sure that they actually are for idle and I can't imaging idle torque would need tweaking unless maybe you had a lightened flywheel or something.
Has anyone adjusted these with success.

sam