I didnt have this problem last year. This year I make 2 changes. I went to an 80mm accufab and long tube headers. Now I am thinking that my throttle may be too large. Last year I could break tires loose in 2nd no problem and break em loose in 3rd if I played with the clutch. This year I cant break em loose in 2nd for anything. There is also no real hard pull til 3500 rpm. I wanted some improvement last year and contacted Anderson Motorsports and was told I needed an 80mm race throttle. So could it be that the throttle is too large? or could it be that I may have a bad tps? The sputter is from idle to 2k or maybe 2200. after this it goes away. Any ideas? It acts as if your in a high gear such as 3rd and trying to drive at 10 mph. From idle it feels choppy also. Anyone have any suggestions I can try?