I don't need an answer -- I'm just THINKING OUT LOUD --- so to speak.
Fuel "boils" when under vacuum (suction) --- so since the pump is external to the tank and pick up --- What size is the pick up tube?? And do you have any sharp 90's on the INLET side from tank to pump.... I try to use 90* "sweeps" instead of hard 90's or GO UP IN SIZE on the pick up and plumbing to the pump to avoid that. IDK.
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