Kurtis

ok i have been having all these fuel problems with my car.first of all when i go to start it after it sits for under an half hour to an hour it dies.i have to keep giving it gas to keep it running.then my car will have alot of power for about 2 mins.then it will run rich and not pull hard.i have enw injectors,new fuel pump, good grounds.its a weird problem, i used to only have power when i was low on gas now this.this used to be an on and off problem now all the time....can anyone help? i am thinking it is the FPR.???????????????? im stuck