Seems to be starving for fuel
I have a 2008 Infiniti QX56. It drives fine going 0-55 mph but once I try to accelerate to a higher speed and in the highway when trying to maintain a speed it wants to spit and sputter. I can pull over and turn the engine off for a few mins and start it back and the problem relieves itself for a short period of time. Even parked in neutral I can floor the pedal and just spits and sputters and sounds like I am pressing the pedal and letting off. I don’t know if I should try changing the fuel pump or something else. There are no check engine lights on.