Hey all...recently i did the airbox modification including removing the tuba and covering the hole, taking out the tray, and removing the resonator. worst part of it all i got a CEL. I asked my boss at work about it and he told me to put back on the tuba. I did that and reset the car (UGH i hate redoing my stations!) but i havent started it back up since i replaced the tuba. Has this happened to anyone and does anyone have any advice on fixing it?