That is very much so, one thing yu can get is an adjustable feul pressure regulator, that will help out. have yu moded yur ignition system? Like coil and firing stuff like that?But yeah yu will need to Reprogramm yur ecu , the thing is the delay time of injector spray(pulse) is long on 90-93 B18A models. with the new injectors there is a very large spray , resulting in there being too much gas now and not enough air. I think Intrax Co. makes an external unit that adapts to yur injectors in case like this. Also i kno here Nogokito makes such units for injector upgrades. One other solution is an adjustable regulator and rail and bring down the pressure a little so there will not be an overspray of gas but still a powerful delivery for performance.