I have 2003 Ram 4.7(stock). Within the past 2-3 week the truck wont idle until fully warmed up and when rev'd up to 4k rpm it chugs and sputters and wont go any higher. Replaced throttle position sensor and cleaned the mass airflow sensor and throttle body under suggestions from local owners still same problem. Will only idle when pedal held.

 

Have you tried to reset the PCM? Give that a shot. If that doesn't work there could possibly be a bad vacuum hose somewhere.

 

I had this problem. Had a little water in tank. Water treatment took care of it. No problem since.

 

When's the last time you had your fuel filter changed?

 

HUH I have a 2004 and was told we cant change the fuel filter, and that its inside the fuel pump or some crazy sh*t like that. ALmost impossible to change unless you wanna pay a couple hundred. Well thats my Dodge dealer told me lol!!!!! Let me know if we can I have 67k and probably need it.............

 

Ill give the resetting a shot and fuel treatment. No clue on fuel filter changed not since Ive owned(3-4 months). Thanks for ur help fellas.