Ill replace the fpr hose and see if that helps if not then ill do the pump fpr will be last since its the most expensive part lolhard to say. what shape are the fuel lines in? if they look decent and there is not any obvious leaks i would probably leave them. i think if you are loosing pressure and you don't have any fuel line leaks it can sometimes be the fuel pump or fuel pressure regulator. i forget which or if it could be both.
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