All it needs to be is just a touch open. The big thing is not to make it real tight or it will never open or take forever. The only reason to open it, is so it can go onto the high idle cam. Once it's on there it doesn't matter. Once you have the speed screw sitting on the high idle cam you can let go the throttle. It's all about the tension or the coil... It needs to be able to suck open a little after it starts. 1/4 inch or so. You got my number call me and I can walk you through it when you are looking at it.