The title says it all my GS is sputtering once it gets around 1500 RPMs there's no check engine light on or any other light. Anyone with similar problems that had it fixed and solved the problem that'd be great if you could share it with me (:

 

change the fuel filter

 

Run a fuel pressure test on it, you can get the pressure test kit at Autozone. Look up how much pressure should be in the system and if it's no where near what you have currently I would change your fuel pump and filter.