Idles a little rough,skips a beat now and then at highway speeds,getting worse. on 1993 Ford Taurus

When first started it acts like a carburated motor that needs choked, wants to die but doesn't,as it warms up it idles a little better, then driving on highway it skips like its going to stall but but not all the time,I have changed the ignition module,the integrated control module,and checked the timing,new air and fuel filters, no improvement,any help would be appreciated.

Asked by for the 1993 Ford Taurus