If I kick it into neutral while slowing to a stop,it idles from 900 to 2100,bouncing back and forth.It does it until I come to a complete stop.If I hit the gas to the floor and let up,it will quit doing that before I come to a stop.
FYI,I dont know how old the O2 was and just changed it,it still does it.?????

90 Amigo,Front 10 bolt with powertrax locker,Rear Dana 44 with Detroit Locker at 5:38.1 R&Ps,Pro Comp MT's 33x12.5 on 15x8 black Rockcrawlers,with a 3" suspension lift.Pro Comp steering Stabilizer.Warn M8000 winch in a ARB bullbar.