I went out yesterday morning, outside temp was around 22 degrees, started the truck and it took a lillte cranking to start it, which is kinda odd, it started and has a little "lope" to it while it was ideling, put it in reverse after a few seconds and backed out of my drive (no gas applied) put the truck in drive, and gave it a little gas, and it started stumbling all over itself, and stalled out. Started it back up and it acted fine. This is the first time the truck has ever done it, and I have a few idea's as to what it could be, but I dont want to throw money at the problem. What do you all think it is?