i drive a 2003 dodge ram 1500 v8 4.6 and sometime my truck runs really smooth i barley tap on the gas and it wants to take off fast but their is somedays when i press on the gas and it feels like its forcing its self....like when its running and i let go off the gas it feels like it wants to slow down fast and when i press on the gas it takes off slow...but when its running smooth it wants to fly and take off and when i let go off the gas it still runs fast.....whats going on?