Here is a question for all you carb tuners. What is the best way to set the air/fuel mixture on my Quadrajet. The thing is brand new( remanufactured by Holly) and it seems to be running a little rich. What is the best way to go about tuning this thing. I've already set the choke and fast idle, but I can't seem to get the fuel mixture right. Also has anyone had a carb that will idle itself up after its already warm? I figured it was just not clearing all the exhuast because the mixture was too rich when it was cold and then it burned better after its warm and idled up a little. Any ideas? The dang thing won't come back down after you rev it either. Is there a valve that is supposed to help with this, or is something just sticking. OK well that was more than one question, but I hope somebody will have the answers, cause I can't seem to figure it out. Oh yeah car info 86 Blazer originally had a 305 and has been up graded to a 330hp 350, the crate one from GM. It has a quadrajet four barrel and the only electronics on it is the one that has two prongs and is on the top passenger front. It has a wire that goes to the water neck. 700r4/208 I doubt this matters, but just in case. Thanks for the help in advance.