I'm more willing to bet its a bad connection in the EATC wiring harness since it started immediately after you pulled it apart. I'd start there. Pull the EATC out and visually inspect the pins of the connector. Apply a little dialectic grease to the pins and reconnect. Always start trouble shooting with the cheap (free) and easy before throwing big money at a problem. Also, always assume a new issue may be resultant of your last actions before assuming its an unrelated cause.