Since replacing a single copper seal to the number 4 injector of my 2.7 crd. (2003) I have not been able to start it. Fuel pressure is just a dribble out of the fuel rail and now it is showing as zero compression to cylinders 2 3 and 4. (5 cylinder model).
I'm now totally lost as what to do. As prior to this injector job it was running perfectly... any help or advice very welcome please... kevin

 

The only thing I can tell you is diesels are known to lose prime if they run out of fuel. The same could be true if you open the system. How you go about re-priming the system, IDK.