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[deizel295]

purge solonoid valve is usually located on the bottom of the evap cannister, which usually looks like a black coffee can or a plastic box with hises running to and from it. p0441 code eh? hmmm, that IS an evap code. i dunno what else to tell you, the reason why it runs crappier when you filled it up is because the valve is proally stuck open, and it is not allowed to open with a full tank of gas due to the high probability of drawing raw fuel into the evap system. the dealership is a bunch of fucksticks if they cannot diagnos this issue. jesus. i would replace the valve and solonoid. that SHOULD fix the problem, like i said, it's not here with me. but with the codes and symptoms thats what you got, a stuck open purge valve. on the bottom of the hood SHOULD be an evap system diagram showing component locations and thier functions, but we can only hope. so let me know how it goes, replace your plugs and change your oil when you do this. the issue of raw fule entering when only a light amount of vapor is suppossed to be coming in can foul plugs ( yes on a modern EFI engine ) and "wash" down the cylinders, dilluting your oil, lowering the effectivness of your oil. hope all goes well man, i'll say a prayer for ya.