whats DFCU?
Is that the variable displacement thing the Hemi engine does where it shuts off half of the 8 cylinders when cruising? In that case it doesnt just shut off fuel, it also closes the valves to those cylinders so they stop pumping. That part is harder than shutting off fuel. Also im not sure how the ecu would work with the scheme.
edit: I think you mean insert a relay to interrupt the electricity not a solenoid.
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