2008 Arctic Cat 700 efi poor idle and stall

[Motormaniac801]

Im hoping someone on here might be able to answer as Ive had no luck with my dealer.
I have a 2008 Arctic Cat 700 EFI that has 328 miles and was running excellent up until this afternoon when I went to run it...now mind you it has sat for a week or two. But I got it turned over first shot no problem and let it ilde for 1-2 mins and took off on it. I got about 400 yards and it started backfiring and starting to sputter it did this untill it stalled. I started it back up and it crank real hard for 10-15 seconds. I finally got it started and let it "warm up" for another min and took back off on it till i got about another 100 yards and it died on me all together. When i tried to start it again, it was stall as soon as I touch the throttle.
I initially thought it was fuel pump but i can hear it run. after doing research i tihnk it might be the TPS (throttle position sensor). Can anyone confirm? Ive heard people talking baout adjusting them, is it something special or do you need a tool or something? Ive read something about "center of the screen" and "lines" and "codes". Can someone shed some light...
Any and all help is appreciated. Thanks in advance