Hi, my turbo gsr is hesitating for normal driving, it seems to only really do it after its been warmed up. I changed the spark plugs and wires and the fuel pump, but it still hesitates...if im on the highway going about 60-80 and I have my foot on the gas just enough to keep my speed it will hesitate pretty bad almost feels like it might die for about a second then it will work fine for a min and do it again.....normal driving around town it seems to mainly do it in the upper gears....anyone know what it could be? oxygen sensor? fuel pump? I dont know, please help, thanks

 

maybe your fuel filter