wow.. loads of info thanks much guys/gals...yeah i did notice once along time ago when i had a battery die i left it dead in truck for a few days actually disconnected since i was rehabbing reconstructive knee surgery the truck sorta sat for a month dead.. it did run like crap for a while.. but had it towed to dealer they replaced a bunch of emission parts for free and i picked it up and it ran fine .. just a random thought at 330 am .. thanks again