Not enough info to help much.
Have you cleaned your MAF? Like has been said you could be running out of fuel too... what size injectors and fuel pumps are you running. I ended up having to upgrade my MAF from a 90 mm lightning to a 95mm Sniper 3000 Bazooka, FRP 42 lb injectors, twin 255 lph SVT pumps and a dual fuel pump hotwire kit. Runs fantastic now.