My idle screw fell out while driving didn't notice a change tell I came To a stop and the truck died. And can't seem to find out what size of screw it was or if it has to be a certain kind. Does anyone know what size of screw or where to find one at.

 

it should be the same size as the throttle stop screw, mark it take it out go to auto parts store or if you have a napa auto parts store near you i would go there ask for all thread in that size then get a nut that fits take it hope cut it to size and install