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This is something thats always confused me. On OEM vehicles I have never seen a problem due to "vapor" lock--and this area is what I do alot. This also goes for a single/dual line setup (being a single you would think it would be more prone to a vapor lock issue due to lack of fuel moving). Now I dunno if it has to do with how the lines are designed or not--but If there is air getting introduced into the system--I can't see heat/boiling of the fuel being a problem--and my rig(setup like a # of others) has been in 100+ temps and never had an issue except with there was an actual pump failure. Now I can see a pump being the root cause because if the vanes or rotors do n ot seat against the edge/internals of the pump you get Aeration of the fuel. And once that air is introduced into the system--it can expand causing a vapor lock...
This is something thats always confused me. On OEM vehicles I have never seen a problem due to "vapor" lock--and this area is what I do alot.
This also goes for a single/dual line setup (being a single you would think it would be more prone to a vapor lock issue due to lack of fuel moving).
Now I dunno if it has to do with how the lines are designed or not--but If there is air getting introduced into the system--I can't see heat/boiling of the fuel being a problem--and my rig(setup like a # of others) has been in 100+ temps and never had an issue except with there was an actual pump failure.
Now I can see a pump being the root cause because if the vanes or rotors do n ot seat against the edge/internals of the pump you get Aeration of the fuel. And once that air is introduced into the system--it can expand causing a vapor lock...
