truck fires right up when could but once it warms up and I shut it down then go to restart after a few minutes it takes a few seconds of cranking. it was the exact opposite a week ago when I found out my batteries were dead. I did just put some power service diesel kleen in the tank when I filled it up the other day would that have anything to do with it? the truck runs like a champ just odd that its takes longer to start when warm. I should mention that its off and on not constantly.