Ok I have just swapped a 99 b16a2 out of an EM1 into a 96 ek coupe. The coupe had the d16y7 in it. The problem I am having is the ecu from the em1 had one extra gray plug that does not seem to be in the harness in the 96 coupe. I was wondering if it needs a conversion harness but both cars should be obd2 as far as I know. I am new to this so any help on this would be great. I can post pics of the plugs if needed. Thanks in advance.