hiphop23j

i just put a mild built type r in my 96 dx hatch, iam using a step down harness to obd1 and a stock p28, my fuel presure is at 40psi but for some reason when i press the gas it bogss, and takes 3 to 4 seconds to rev and the same amount to stop even if my foot is not on the gas anymore, i did the iacv trick n i dont know wat else it can be, my o2 is not plug in, but besides that what can be doin this, help asap.