Join Date: Aug 2004
Location: Battle Ground, Wa
very common.too much fuel too soon at low rpm. thats why you don't experience this problem at high launch rpm.the black soot is from overly rich air/fuel mix at idle. mine does the same thing when cold.there are lots of carb tuning shops around that can customize your carb to your engines requirements and your driving. kind of like dyno work. i've been quoted 200-300 bucks to make it the best it can be. they change metering rods,jets,accelerator pumps, ect.