Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
I might be able to help you, but first I'll need you to please answer the following questions:
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This fuel pump works off a pulse-width modulated (PWM) signal, not an OFF and On signal as in previous model years. Using PWM, the onboard computer (PCM) is able to run the pump at different speeds so there is no need for a fuel pressure regulator.
Proper way to test this system is by using a capable scan tool such as the NGS and a meter that can read frequency in Hertz, but you could eliminate the pump itself as being the culprit by doing the following:
I've attached the circuit diagram for your reference. Please let me know if you need further assistance.