I know this sounds funny but when i run my truck down to a quarter tank of fuel or less it seems to runs a whole lot better than if it were full? Is it just me or has anyone else had this problem? I know it sounds kinda stupid but any advice would be appreciated. thanks

possibly from less weight, but some factory fuel pickups will start to get air bound and cause engine to die. be careful.

Thanks, I think i might drop the tank and see whats going on. Also i put a new fuel regulator (mprop) a few months ago and here lately its been wanting to lunge foward at stoplights once in while not all the time. Ive always ran an aditive either howes or power service. I wouldnt think the regulator bad already?