Almost stalls..

after staging and doing a full throttle burnout through 1st and 2nd gear when i let off the gas it nearly dies and i have to feather it back to life. feels like its starving for fuel. possible jetting issue? also, myself and a friend tuned the car in the dead of winter in indiana 3 months ago. now i live in arizona and the car just doesnt seem to get up and go like it did. would the air/ elevation change have a huge affect on my performance?