hey guys im still new to the tuning thing and i had my computer tuned buy madz28 but i would like to datalog it, i have datamaster but not sure on how to use it. i am having a stumbling issue at 1400-1500 while cruising and would like to see were it is coming from. i was wondering a bout my air/fuel guage but i think i figured out what i was seeing, it is the Decel. Fuel Cut Off, but would like to know what is causing the stumble, my guage while it is stumbleing will go balistic then return to normal after a few sec????? it only seems to be at 1400-1500. or around there