Ok guys heres my story. A buddy of mine is looking at buying his first diesel truck and found an 05 DMax (build date 8/04) that he really likes. The problem that he has is that the dang thing hunts throughout the RPM range, even under light to medium throttle. It is fairly bad at idle, bad enough that a guy can see the open door move up and down as its doing it. The truck has 83K miles on it and to his or the dealers knowledge has never been poked with a programmer or chipped. Anyone have any ideas as to what he would be looking at for a cause of the hunting rpm? The truck has been serviced not to long ago, 1K miles, and pulled the stick and took a sniff. Had a hint of fuel smell, but I'm not sure what kind of oil was used in it when it was changed. Thanks for any and all help guys!