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With the filter top off, cranking the engine, does the filter housing fill up and over flow?
Is this a power stroke engine or the old IDI engine?
Check the high pressure pump reservoir to see if the oil level is about 1 inch below the top of the cover, let me know what you find.
Its possible then that the IPR has stuck open after getting debris in it, I have seen the wires to the IPR break inside the covering and loose contact.
Since the fuel filter housing is filling up but your still getting no fuel to the injectors. This means we now need to perform a fuel pressure test prior to the heads while cranking the engine, can you do that?
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Thanks, ***** ***** you take this fuel pressure reading at?
Thats odd your getting 30 psi at the shrader before the pressure regulator since the the shrader is on the return line after the fuel has flowed through the heads. Did you remove the fuel inlet lines at the head, crank the engine, and verify no fuel is coming out?
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Are you sure there is still not an oil getting into the fuel issue, it could be oil pressure your getting at the shrader.
Based on the fluids being dirty. I may be best to drain everything, take all the lines off and clean everything out.
The engine can burn oil, so its not going to hurt it, its actually good for power and injector lubrication. Normally oil in the fuel means there is faulty injectors, or a internal crack in the heads and the oil galley is pumping oil into the fuel galley. To diagnose that, you cap off the fuel supply or return line and use 60 psi air pressure on the other fuel line to see if it can hold.
Since its had crisco in it and now you have found evidence of clogging up. Being its a return fuel system. Once you start cleaning you have to clean it all at once or the gunk at the end will be able to flow back to the beginning where you have already cleaned. I would use alot of spray can brake cleaner and compressed air on the tank, pump, lines, filters, regulator, heads.
If you are wanting to address the oil system at the same time as the fuel system then yes you would clean those out as well. I was just sticking with the concern you mentioned of no fuel. While cranking the ICP should register above 500psi or it will not start.
Make sure the acetone will break down gunked up Crisco. I know ether will but its expensive and sprays a can empty fast.