Awesome sauce! I'll look into it

Hey man, I am havingbthe exact same issue, with throttle acting up, same stillen sc kit. I think it might be my gears that are attached to the tb inside the black housing, what did you end up finding? Please help man

Try cleaning your throttle bodies but make sure you unbolt them so you can clean the back side. This is a fairly common problem with our cars. Also do a manual throttle body relearn procedure which can be found by googling throttle body relearn procedure 370z. It may take you a few times of trying to get it right but it's really not that difficult. Make sure you use actuall throttle body cleaner and make sure it doesn't spill onto anything. Use a micro fiber and make sure it doesn't get into the manifold. Use a wire brush or toothbrush to scrub throttle bodies. Also while you're at it take the front bumper off and clean or swap your k&n air filters and your maf sensors. If you're not sure how to do any of this just pm me I'll walk you through it. It's not difficult at all I promise if a noob like me can do it then anyone can do it

But whatever you do don't over oil the k&n's because you'll most likely soil your freshly cleaned maf sensors

And make sure you give everything ample time to dry! Very important. Although those cleaners dry really quickly