I “assumed” that efi wouldn’t allow a vapor lock to happen. I’ve seen guys run fuel lines in some stupid places, like right beside headers and turbos, without a hitch.
What does your fuel pressure gauge say when this happens? Maybe try and pop the orifice at the fuel rail to see if there’s fuel pressure there when this is going on, regardless of what gauge says. Heat is your enemy when it comes to fuel systems, especially with an inline pump setup.
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