I am doing a swap. 98' GSR into 90 CRX DX. I am using a jumper so I can use an obd - 1 ecu. I want to use Hondata, but, will the secondaries work with the hondata. If not, I am going to use a p72. Is there anything else I can do because I want to use the Hondata, I am hearing good things...

 

IAB valve is activated electronically by the ECU. It's not simple vacuum and mechanics.

Using any but the P72 ECU will not allow the 2ndaries to open.