okay so I only have till the end of this month to smog my truck. the first time i tried to smog it, it was idling wayyy too high at like 1500 rpm in park. now the guy told me its idling closer to 1200. he said it needs to get below 1100 at least to work. 1000 is the target. how i fixed it the first time was there was a fat radiator leak and there was no coolant in it at all. but now what? should i bother adjusting the idle screw? how do i fix a vaccum leak if i have one? could it be the o2 sensor? map sensor? please get back to me i need to smog a.s.a.p. im not going to ahve a lot of time near the end of the month to work on this truck thanks.