well at -20 and the truck went to the shop today. they changed the fuel filter but it still seems slugish. they said the filter was waxed up. with the chip at extreeme it still seems to be starving but goes away at a lower setting. its still like 0 degrees outside though. i put some anti-gel treatment in the tank but im wondering what i should do. will it go away or is it possible for something else to be clogged (injectors, fuel lines, ect.) if so will it go away?