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Hello, my name is Bobby. Thank you for the question. Can you tell me how many miles are on the truck. Are these same codes still coming back after the air flow meter was replaced?
Thank you. So I know where to proceed can you tell me if you have a fuel pressure tester and if your scan tool reads live engine data?
These would really help in diagnosing this and not just throwing parts at it. It may be the TPS but low fuel pressure can cause these also.
You would install the pressure gauge to the test valve on the fuel injection rail. You should get about 35-40 psi. You could start with the filter if that has not been done recently.
The scanner won't tell you what the fuel pressure is. You need to look at the fuel trim readings. They are STFT and LTFT. If they are more than about 8 constantly then the engine may not be getting enough fuel.
If fuel oressure is low replace the filter. If it continues replace the pump. If the pressure is fine then see what the TPS sensor reading is with the scan tool and see if the signal moves smoothly without interruption when pressing the pedal