i have 2006 gt with a steeda cai, sct tuner, and aftermarket exhaust. a few days ago i went to floor it and the car stopped pulling at about 3800-4000 rpms. it happens on and off but lately its been happening more often. the car sounds like when it hits 4000 it seems like its kind of in neutral revving. it has barely any pull and im really scared. the rpms start to creep slowly up to about 5000 and it seems to go no more. please someone help!