I took my truck to the dealer for hard starts, blue/gray/white smoke, shuttering on the highway and poor fuel economy. The replaced the EGR valve, EGR cooler and flashed my FICM. I just picked up my truck and it still shutters slightly on the highway and it has a rough idle. At first I thought it was because the engine was cold, but once it warmed up it continued to do it.
before I picked the truck up I asked if they tested the head gaskets and injectors and he said they pressure tested the system.
oh and now I have a popping under the front end when I turn or accelerate.
Any ideas? I have called the dealership twice and they won't take or return my calls