How do you properly tune the engine to run its best? I've read up and watched videos on youtube and i got the gist of what to do. It seems that when you tune your engine you mostly adjust the Hsn or the idle screw but when do you adjust the Lsn? i got my jato running, it kicks alot of blue smoke but sounds a little raspy. Also it doesn't want to sit still, it still wants to move when it comes to a complete stop. I adjust the idle screw little by little but it gets to the point where its either the car will move or it will stall out. Any suggestions on how to fix this and clean everything up?