how long do you drive it, i have to drive mine about 5-10 mins before its warm enough to drop its cold idle
could be a dirty AAC Valve >>DIY to clean it<<
might not be set on the other settings properly
set it up just like the picture if you want a factory rev limit leave that part alone
http://www.paulr33.com/powerfc-emulator/menu_1_2_10_1.html