I spent a good 3 or 4 hours today running diagnostics. The rattling sound i determined comes from the back side of the motor. I got the best results at the back of the valvetrain. Also noticed the throttle bodt rattling as well. My car does it from about 2500rpm up to 3000rpm. Cruise control set at 75 and i wanna rip my ears off lol. Gonna spend all of sunday with a stethescope and see if i cant get a better location.