So this is happening in a buddys car. Its a all motor built gsr with rdx injectors. It was tuned by Mikey at Profunction. All he has to do when he drives it is get on it enough for vtec to engage and then when he lets out the car goes pig rich and stays there for 15 seconds or so. It will almost foul the plugs cycling the key when its rich also gets it to stop. Any ideas on this? Its also tuned on eCtune.