Congratulations. There's nothing like luck to help persistence.

Does that show CTS and MAP both decreasing? Are you sure all the grounds are correct?

Generally a problem like this will avoid diagnosis due to some assumption being made. Believeing a pcm is...

Sounds like most everything's covered. I might open the cover on the ecm just to make sure "what I know" is true... that chips didn't get knocked out during swap.

Ground problems can cause some...

Has either of the original chips come loose in the ecm? Was either of the chips removed for any reason?

Routing speed sensor wires near spark plugs or coils can create a varying voltage which the...