I just did a diesel purge before I change all three of my filters. I stopped about half way on my normal course and it was almost gone already. I see that the return hose to my jug is only dripping and the diesel purge is still green when it would be black at this point.
So far I have checked the return line to the tank, return from the motor to the spin on filter, pulled and checked all five of the injector return lines(they are new). Still very little return diesel fuel. I have not changed the filters yet but can not see that would cause any of this?????
Edit: I will pull the banjo bolt and check it as well.

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1985 300D burning WVO using 26 FPHE, half gallon heated fuel filter,glow plug heater,home made injection line heaters. Home made cold air induction. ALDA full out.
2003 F350 7.3(the last of the great motors)
1987 Paint Horse-non running too, just walks!