Sounds like youre running rich,wich is a good thing.You need to goahead and install the OFNA.It will be much more easy to tune.There should be pictures in the previous threads on the correct way to install it.As far as removing a stone,I never did that to mine.The NEMESIS is not an "entry level"truck,but you can learn with it if you let these guys walk you through it.All the help you will ever need will be here shortly to help.I will warn you,theres one guy that will be here that only has negative things to say about cen.You will know who he is when the time comes.Just ignore him.Its hard for me to explain how to get your truck running when you dont know the difference between rich and lean or your high from low end needles,but be patient and help will be here to walk you through.