86 560 sec rough idle when cold
 

My 1986 560 SEC idles rough when it is first started, it does smooth out when the water temp gets above 80, but it still has a slight rough idle. I have change the vacum fittings and lines, has new plugs.

this may be normal and is nothing to worry about. When you first the engine it will be running in a rich state causing the idle to be rough. Your car is in open loop. As the car warms it becomes more lean and goes to a closed loop because the engine coolant has reached the proper temperature