Outer Limits 4x4 Board

I have noticed that lately the truck is running rough when standing at the lights in drive.as soon as i take off no dramas iam thinking injector but why does it do it when the rpm are up unless the other 3 are giving enough does anyone know.

I've had this sorta problem before, except in a lux First check Injectors, then pump-highlt likely it's not though, and then the fuel filter

cheers