my 5.9 360 will start up and idle fine but at steady throttle at anything 2k rpm+ the rpms will jump around anywhere from 50 to 150rpms and it it sounds like a sputtering kinda noise . ive replaced tps crank pos sensor cam posit. sensor cap rotor plugs n wires battery terminals used injector cleaner and dry gas please help

 

Checked your plenum?

Test the TPS. Bad parts right out of the box aren't unknown...

 

Dry gas?????

 

Think he means Heet added to gas tank. Use the red. Look at that tps again, and sputter, clogged cat? Any cel's?

 

I'd check fuel pressure also!

 

check engine is on but i havent scanned it yet i lent out my scanner at the moment but im thinking possibly the map sensor maybe?