well I am rather new to the diesel world and I am trying to learn as much as possible I just bought my truck about 2 months ago, and it has started getting cold in the morning. this morning it was about 40 degrees. I have noticed that the fuel warmed has started sounding different only on the first start up of the day and when it is cold. then this morning was the coldest so far and when the light went out i started it and the engine was kind of lurching up and down for a couple seconds bad enough to cause the truck to shake back and forth. but after a couple seconds it settled in to the normal high idle. was hoping someone could offer some insight as to what the problem may be.