[1997diesel]

HI i have a 1997 ford E350 turbo diesel powerstroke
i was driving and everything was fine then my check engine light blinked and truck shut off . i tried to start it and it wouldnt start . i left it siting for a few hours when i got back to it there was a huge pudle of oil under it i mean like galons. i tried to find a leak and i cant find out where its coming from but its somewhere from the top of the engine where the waley is around fuel canister , any ideas of where this might be coming from its got to be a huge leak but i just cant find it. thank you .







PLS HELP ITS URGENT