I have the hondata 2b set-up. now, I am looking for a obd1 ecu with the knock sensor...Since the p30 is almos impossible to find, I am leaning on the p72. It is for my drag gen 3 si(sir). So I was wondering how do you guys do to take off the secondary intake runner out of the ECU. If you know something, please drop a quick reply...Thanks.

 

pull the pin. however, you might (most likely will) get the check engine light.