You have a couple lines that go in and out the fuel filter housing on top of the motor that could be leaking. Then there are two that run out of that housing and go to the front of each head and are held on with banjo bolts. May wanna check those and all your other lines and fittings. Also there are two plugs one on the back of each head. They have a allen head on them they are hard to get to/see but you could have a leak there too. Hopefully that gets you going in the right direction.
A forum community dedicated to Ford Power Stroke owners and enthusiasts. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more!