So its my first nitro truck and i just got it all ready to go and got it started and it was idleing super high so i turned it down and it killed it. started it again and it bogged out and now it wont start at all i tried messing with the idle screw but no such luck it seems slightly easier to pull as well any ideas?

try adjusting ur throttle trim on ur controller
nitro engines have high rpms so just as long as ur wheels arent moving u will be good

What car is it?

sounds like ur low speed needle is too rich. lean it out and that should also help ur idle along with the idle screw