Turn that screw thing in the middle, and round the side you have a pointer which points to what number you have adjsuted it to, fairly easy to not see if from a distance. I think 0 is fully on (no fuel cut) but you have to find the correct setting, as setting it to 0 (or too low) will make the car run lean. I think you possibly want it to setting number 7-9? (not sure) but the higher you set it, the less it will defend fuel cut. I reccomend you getting it set up professionally allong with the fuelling to make sure you don't fuck it up.