Slightly wandering and slightly rough idle when cold (open loop). I get a very very slight oscillation in idle when warm (closed loop), but really maybe a 40-50 rpm up and down.
I've cleaned up the ground at the block and put in a new negative battery cable to that point. I have cleaned up the connection points on the braid. The braid is old and I think I will replace it soon.
I've been considering putting in one of these:
http://www.ronfrancis.com/images/part-pic138.jpg
And tying all the ground points together in a star ground configuration so I'm sure everything is at the same ground potential.
I think I may have a small vacuum leak contributing to the idle, but I'm not sure if it would manifest with the difference between open loop and closed loop modes, that points more to electrical to me, what do you think?
Thanks.
Dave