The engine is the 5.9L V8 HDC 360 gas.

Hello, It is very hard to say via an Internet forum what might be happening with your Dodge truck. A good hands on inspection is needed. An engine performance issue is definitely occurring, caused by an issue with the air intake system, fuel delivery system, spark system or even a possible exhaust restriction. You could even have a base internal engine issue, but your concern description alone is simply not enough to drill down to what the cause of failure is.