I just passed on that question to the tuner. I am not sure what was changed but will look into it. I have not figured anything out yet and I am aggrevated to the point of wanting to take the larger intake off because I have not found any solutions. I am getting a too lean code on bank 1&2 while driving but the main thing is the stumble at startup and not wanting to start after fillup. Could this cause these problems also are do I have fuel delivery problems? At the track, it was not any faster and my mph has been low for the last 3 times that I went. ET is average but mph is down. Any suggestions at this point would be appreciated.