Just recently had the all the problem childs fixed on my truck head gaskets studs long pipe dummy plugs glow plug harness egr delete tuner injectors got the truck back when it warms up the wrench light comes on spits and sputers then at some points the rpms will drop and go right back up while driving any body have a clue what it is the mechanic shop has been trying everything to figure it out they said it has random misfire bounces from cylinder to cylinder so they cant pin point the problem anyone have sugestions on what in the world it could be?
