How to figure out what injector needs to be changed?

So my truck is acting like it did before one of my injectors went out before. It is sluggish when cold but runs good once warmed up under acceleration. When running about 60 mph and 1700 rpm you can feel it misfire. Some times at idle I can feel it misfire as well but not always. I have AE and there aren't any misfire codes. Buzz test checks out fine too. How do I figure out which injector is bad? Am I wrong and it might be something other than an injector?

Thanks,
Brad

Find someone with IDS. I use it all day everyday. The power graph is very accurate