like the title states, i have a 96 civic dx that has a b20 swap in ti with obd2 LS intake manifold, obd1 tb with fitv, iacv has been rewired correctly and i have continuity tested them. if i plug up an obd2 LS automatic ecu, it runs fine just throws a 2nd o2 code. once i plug up the obd2a-obd1 conversion harness and 5spd obd1 ecu, it throws a code 14. any ideas what would cause this? ive swapped iacv's already and no help. thanks in advance

 

well, swapped IACV's when engine was warm and light went off, started it about 3 hours later and it came back on... i need help!!