I bought my 2500 Hemi Ram new in 2003, and have been having intermittent engine problems. Sometimes the engine will not produce any power when you mash the accelerator pedal. The engine will also act like its missing pretty bad. You cannot got over 30mph when this is happening, then out of nowhere the engine will catch up to the throttle position accelerate the vehicle to that speed. This has happened from time to time since I have owned the vehicle, and the dealer said they can't find a problem. Has anyone else had this problem or heard of it, if so is there a fix. I have 69K miles on it and the spark plugs have been changed, problem still there.