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new circuit using a 6-8 gauge wire to a relay grounded triggered from the ecu? If i remember correctly FPC its just to lower the volts to the pump to reduce noise at idle & cruising, and to extend the life of the pump itself...? I recently heard that 350Z fpc works off a fuel pressure sensor and since it's a return less system the fpc can practically tun off the pump until its needed and if thats the case that would be a worthy upgrade running a dual pump return less system.
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