I'd check your grease vs d2 plumbing for leaks. Clear fuel lines makes it so much easier to track down pesky bubbles.

Bypassing that mess as was suggested with a temp tank would prob help narrow down where a leak was comming.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)