Got a 4 barrel motorcraft car on my 351 and it is idling to low and dying. How do I adjust the idle up and what is the proper way to adjust the air fuel mix? I know where the air fuel mix screws are but do not know which is which. The way I remember how to do it is you back them out until the engine just start to die then you take them back in a 1/4 turn. But I do not know if it is like that for all carbs or if that is even correct. Then with the idle the way I remember is that you warm up your engine, then set the secondary up a notch and then it gets blurry. But I am not sure if what I think I am supposed to do is correct. can someone either refresh my memory or tell me the right way to do it?