Avalanche, I think he does not have his carb set to factory settings the way it is now! If he has it at 3.5 turns out from flush that would be too rich I am guessing If the factory settings are flush? If he sets it to what I think is the correct setting (Flush) more than likely it will run just fine but, if it is still too rich or too lean at that point I would adjust the HSN! I hope all of this makes some sort of sense!LOL