Alright, puzzle me this.

It's still vapor locking when hot.
I verified this by pulling the hose off the inlet and it was pressurized after sitting fifteen
minutes by mostly vapor and little spurts of barely fuel. This part isn't so surprising, as it's cramped and hot as heck in that engine bay.

My hope was the electric pusher pump would push this vapor on out and re-fill the system inside a few seconds allowing decent warm starts. BUT, when this business is going on, the pump is loosing prime, indicated by a tell-tale noise, and it cannot re-prime for some reason. It's a heat issue somehow, as it primes fine when cold.
After a looong crank time, it eventually struggles to life, and shortly after the pump quiets down.

So, what the heck is making the pump loose prime and not be able to re-prime, when hot but fine when cold, as in overnight, or even when only sitting a short time?
Thoughts?

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K