ok two problems. when i start my car, it seems to idle pretty low, around 600. i know when u start it the idle should be normallly higher, arent i right? what might be wrong. after i drive it around a bit though, it evens out at abotu 750 even. also, i wanted to set the idle a little bit higher..maybe 800. how do i do it i forgot. do you unplug the eacv then turn the screw, or can i just turn the screw with it plugged in?