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I was checking for fuel line leaks today and noticed foaming on the (feed side) hose fittings right before the Aeromotive fuel pump. Before I replace this hose & it's fittings, I would like to know what is mainly causing this?
BTW, my return line is plumbed into the sump right next to the feed line.I understand that this is incorrect (not for long) .Just want to know if that is the main cause of the foaming and that I'm not overlooking anything else.TIA
 

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Are they flare fittings or NPT?

Could be a bad flare on the pipe or degraded seat.

Something to look at closely, not in or on the car if possible.
 
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