its possible you have a bad injector. its also possible you have a burnt/warped valve causing the miss. lets hope its a injector. you can change injectors but its not too easy.
you will have to take the upper intake plenum off and take the fuel rail loose to pry the injectors and rail out all at the same time. then take the cap off the injector and put the screws back in, take a flat screwdriver and carefully pry up on both sides of the injector.
if you havent already downloaded the FSM on the forum, then i suggest you do so.