Truck recently has started to feel like it has a random miss. When you put it in drive or reverse at idle it will run smooth then the engine will start to shake and the rpms will bounce around a couple 100 in either diection then smooth out again. That and when it is in overdrive it will randomly miss. It popped up a P0174 (I think) is was a to lean bank 1 code. Check the PCV line but looked ok