My primer is a yellow button on top with a button on the side which I push in al lthe way then I pump the yellow button. Is it the same one your talking about? If so, what am I exactly tightening when I push all the way down? I did the fuel line thing with loosening the nuts, but still nothing. All my engine is doing now is taking the fuel, trying to turn over but struggling, then fuel line goes empty. I am thinking maybe a clog somewhere in the injector itself but am not entirely sure, since it was cold for a while here.

Sorry I have not been back to this thread to check for a response.
I was for some reaon thinking Mercedes
I guess you Engine does not have the same type of Hand Primer.
Who makes the Engine in the Ford? From what I could find on the internet it has a 2.0 L Mazda RF Diesel I4.

If one of the Injectors in the Engine is completely pluged this does not stop the Fuel Injection Pump from trying to deliver Fuel. In fact if an Injector becomes completely plugged usually the Fuel Injection line splits or craks off completely; as there is no place for the hydraulic pressure to go so the weakest point suffers.

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84 300D, 82 Volvo 244Gl Diesel