hard start and dead spot

1995 firebird v6 is very hard to start once i get it started it has like a dead spot on accelaration right paste idle ive changed the iac valve the tps new plugs and wires whats left lol thanks for any help

change fuel filter and have fuel pressure checked

i have also changed the fuel filter and fuel pump relay still nothing its even harder to start now... :confused:

get your fuel pressure checked. eliminate that end