Running an LSx engine, 90 mm TB, turbo, etc. Swapped in a 4L80E transmission. Now engine hunts at idle (RPM up/down). I can prob move the Closed Loop/Learn up to 1500 and manually tune it out. I have both set at 500 now. I have the timing, AFRs, etc., all smooth in that area. Seems like the Learn wants to remove fuel, Closed Loop wants to add fuel. I had it pretty well stabilized with the turbo 400, but with the looser converter in the 4L80E changed it. Thank You.

UPDATE: I noticed I didn't have the Idle Spark enabled, so I tried that and it seemed to really help it out.