Just picked the truck up about a month ago, my first cummins, everything works great but it dosnt seem to start all that well. 70 out today and you can crank for as long as you want and no start, hold the peddle half way down and it spits and sputters for a few seconds then runs fine. Shut off solenoid opens all the way. Is this normal? I had a 99 powerstroke and it poped right off at 20below not plugged in. I have all summer to ding before winter.