How do I put a new Ecu?

What is your question?

I own a 1999 Civic Si with a b16a motor I'm currently using a chipped Po7 Ecu but I want to go back to stock and go with the p2t Ecu because I'm currently having issues with the po7. How do I replace the po7 with the p2t do I just remove the old one a connect the p2t Ecu or do I have to do something before i add the stock Ecu, for example do I need to do some special adjustment or something?

What makes this problem better or worse?

Problem with ecu

How long has your 1999 Honda Civic had this problem?

For a few weeks