I was able to locate the cause of the problem. On the top of the throttle body is a nipple fitting that accepts the rubber T with the hoses connected to it. While visually it looked to be installed, I was able to push is down tighter onto the throttle body with a long screw driver, thus making a tight seal. Air was probably leaking past when it wasn't push all the way down onto the throttle body. The check engine light stayed off today and I feel the idle smoothed out a bit.