cashmoneyga

I just bought a 75mm throttle body and plenum and bbk fuel pressure regulator, well the plenum hasnt come yet so i put on the thottle body and fuel pressure regulator on and now its not running right. I've adjusted the fuel pressure all different ways and that didnt do anything. It takes about 5 secs to crank, seems like its not getting the gas it needs. I rev it and it hesitates alot and when getting on it it doesnt go like it should. I can tell its not getting the fuel it needs. Could i need bigger injectors or is there something else i can do? Everything is completely stock except the exhaust and what I just mentioned. Any help would be greatly appreciated.