OK, so I finished adjusting my Crane Cams Rollers becuase they were clattering bad. I adjusted the rockers 1/2 turn. The noise is gone but here is the problem. When I start the car it sounds perfect for about 30 seconds and then it starts sounding like it is only running on 7 cylinders or something. I ohmed out all the wires and they seem fine and the plugs are new. Does the symptoms sound like maybe I need to re-adjust the rockers a little loser?