in 8 hours or so....why?!? Every morning or anytime after I haven't started the truck after a long period of time, I have to crank the engine before it either slowly starts up or I let go and turn it over again. If I don't get it to start on the first try, it pops right on the second time. Why is this? Do I need a tune up or should I replace my spark plugs or something?? It's got about 75K miles on it and I've had both the battery and alternator checked and there at 100%. Any guidance is much appreciated!