hey just came here for some help.. just wondering on what to do.. just finished dropping an F20B motor into my civic coupe.. Now heres the question , which ecu do I stick with??? I have a p28 where I used an obd1 obd2 converter .. the ecu runs like *** maybe with better tunning I should get another program for the ecu. Since this nonsense occured should I stick with the stock OBD2 PCb 004 ecu that the F20B comes with.. please someone tell me the difference between both ecus because I want to get the max potential from this motor

 

What map you run with P28? If you run with H22 base map you should be ok. I don't know what ECU F20B running, but I think you could use H22 ecu, but if I remember right all ECU from 97-01 equipped with immobilizer. I think the only choice is 96. Correct me if I'm wrong. By the way, you should post in Prelude forum as well. You might have more help there.