I'm not sure what is going on, everytime I add gas to my truck, it has trouble starting. The lower I let my tank get the harder it is to start, I'm trying to fill up now after using only 1 quarter of a tank. It takes forever to crank over after filling up sometimes not at all. It may even take 3 or 4 times to get it to start. It only has trouble when I add gas any other start up has no problem. Has anyone had this happen? Ive asked several people and they have no clue