1999 - hesitation and or miss while taking off!! I've put to bottles of fuel line freeze protection & some fuel conditioner threw her,new plugs & wires & changed the fuel filter,still hesitates,where do I go from here?

 

Update: Guess I was just not patient enough, I finally finished the tank of gas with all the fuel line freeze up & conditioner,by the time I was down to my last 1/4 tank she started running strong again!!! I guess I was expecting immediate results upon dumping my bottles in. Live & Learn.