My car idels up and down quite a bit everyone once and a while. From me searching online i hear there is a idol control screw somewhere on the throttle body. Went out and looked, all i found was the throttle control nut under the throttle body. Now are these the same thing, or do i need to look for something ealts. Its a 5th gen d15b7

 

check your coolant level, if thats not it check your fitv.
dont mess with idle screw, its not its fault