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I am having a similar issue with mine but the rail pressure is 8-9k at idle.
replaced both fca's
replaced controller to a fish tuning.
i bought an aeromotive 230gph lift pump which recommended a -10an line into a fleece fuel filter bypass then -8an to each pump. I have a -6an return hose. The lift pump is set on the lowest setting (10psi) and at the engine it is reading 4psi (increasing causes the idle pressure to rise) I am thinking that FLOW and psi are not the same as the feed is 5/8". Do I need to add a aeromotive FPR on the return line?
At this point I am a little stumped and would appreciate any help/advice you can give.
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