Does anyone know if it normal for a Holley to run rich while at idle? I have my engine built and running and it seems to run good. I do notice that when I pull the plugs they are black with soot, evidence it is running rich. I was told this is normal for Holleys and that when I get it to the lake and open it up it will burn that off and burn normal. I just want to get this ironed out before I connect the driveshaft and head to the lake. The Holley is a 4160 and was bought new and still pretty much new. Thanks for any help on this.