Vapor lock on a diesel? That's one I never heard of. Ain't saying it ain't possible though.
The thing about vapor lock, that I remember, is that it always happened to me on hot days while driving in stop and go traffic. Never out on the open road.
Would air in the HPOP cause this to happen too?
2008 F450, 6.4 183,000 miles, utility bed /e99 F-350 Utility truck. 9' bed. swamp tunes, 6 speed. 353,000 miles /02 F-250, 4X4, PSD, CC, Auto, Hydra with Swamps, Gearhead and PHP tunes, 160,000 miles
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