Fuel leak

[fredh]

the fuel is leaking from both the front and rear engines above the strainers. when i shut the fuel off inside the leaks stop. it acts as if the system is pressurized and weeping from the strainers or above them. some fuel comes from the strainer tube, but i'm not sure if it is following down the outside or inside. i am going to work on the airplane wednesday and thursday evenings so i can look deeper into the leaks origin. the airplane never leaked at all before and now from both engines at the same time. seems like there should be a common denominator? any idea's ?
thanks
fred