Weird studder when floor the peddle: pls help

[ther1pper]

hey.. i have a 98 gsx, and like i got this car and like i was driving it, and like it started to studder alot when i press the gas hard, it like jerks alot like its not getting gas to the engine or some shit, i have had like 4 or 5 people ride with me to try and figure it out, someone said it might have something to do with the injection system, but im not sure, anyone had a idea???? if u know what im talking about?? pls help