big problem plz read
 

WE have a 1999 f350 its been sittin for almost a month bkuz its been realy cold.....it got around 55 degrees today so i started it up....everything was fine so i went inside came back out and noticed i was losing a lot of fluid so i ran and turned it off....i smelled the fluid and its diesel....opened the hood and everything is soaked...has anyone had this problem??...if not where should i began to diagnose it? i will prolly trace the fuel line to the fuel rail tomorow but if anyone can help me i will greatly appreciate it