Common problem with these cars.
New plugs & wires usually corrects this.
Most guys recommend factory wires & Motorcraft or Autolite double platinum plugs.
Does your engine light come on? My cat broke up terrible at 3000rpm it turned out to be my DIS, the dielectric grease was all dried up.cleaned it,put it back on,no more problem. this is an easy(and cheap) first check, good luck...Bill