I put a new carb on my fj60, and have a few questions for you folks. 1. how do I know if the air/fuel ratio is right? I know where the screw is to adjust it, but don't know if it is set right or not. 2. what should I set the idle to? I have it at about 950 rmps right now. 3. there is no question 3, I just have issues Thanks folks!