2008 Honda Odyssey Car won't start when I transfered all the parts from one car to another

So I bought flooded 2008 Honda Odyssey, and of course it does not work. So then I bought another 2008 Honda Odyssey with some small accidents. I decided to removed everything out of the flooded Odyssey and took the parts from the other Odyssey and install it back into the flooded one. (The other Odyssey works perfectly) I literally exchanged every part one by one from scratch and the frame was the only thing left. After all of that, I tried to start the car but the engine doesn't go off, but everything else works, the doors, windows, etc. In my head I would think its because of the computer, but it would be the same parts. Besides from being in a different frame. So I don't understand why it doesn't run. Any help would be greatly appreciated. Thanks, Paul.