I'm probably speaking out of my ass in regards to the condensation... but I know the computer is on the driver's side rain tray. Is it possible dude messed around with the rain tray/fire wall? IE, went to swap a chip, fucked shit up, and allowed engine bay air to hit the driver's side? I know there's a few grommets going from rain tray to cabin, and could possibly allow engine bay air up through the dash if the rain tray is wrecked and they're destroyed or removed. It's possible even it's the speedo cable grommet.