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Herr & Teague,
This is good stuff. Sounds like we can rule out the membrane failing as we would end up with fuel in the oil and likely a bunch of smoke out the tail pipe. The parts do appear as if the have been hot but gasoline will auto ignight at 495f.
I have also read about many of the low pressure intank pumps either failing of becoming noisey. Perhaps the real issue is not sufficient volume of fuel reaching the HPFP causing it to overheat. If the intank pump is not replaced, replacing the HPFP will just be a bandaid. It will continue to fail until is has a constant supply of fuel.
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