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A leak/air entering in the fuel line will also cause low fuel pressure. On my old Duster mine was back by the fuel tank and the hose didn't leak fuel. It gave me fits for about 3-4 weeks before I figured it out.



A hard gremlin to chase.. The fuel line is sucking from there and will not leak but allow air to enter from the suction of the fuel pump.. Your looking for fuel leaking when its air being sucked in....