1994 Dodge Ram Truck Shutters and stumbles at part throttle

Engine Performance problem
1994 Dodge Ram Automatic

When I apply gas I can hear the engine pop and shutter through the exhaust like a misfire. At Highway speed the truck shutters and shakes, I release the fuel pedal and it stops. On acceleration it seems fine but when I reach my desired speed and partially release the fuel pedal at highway speed it shutters and sounds like it's misfiring in the muffler.