203_EM2

got a b18b1 in a 96 hatch. OBD1 motor running a dx harness with jumper harness to OBD2 and a p75 ecu. car idles REAL rough i cleaned the FITV and also the IACV nothing happened. when i hold the idle at 1500 it bounces slightly almost like a 2step would and also does it at 3-3500. idle drops from 1-800 rpm. when i drive and its in gear when the rpms drop to 1500 the car jerks back and forth until i give it gas or shift gears..... any idea what it could be? its throwing a code but dont know for what do not know how to check.