[Two Mikes]

Old age? USLD or biodiesel? Water corrosion?

Thankfully this cleared it up, a new pump is too expensive!

 

[jon applespeed]

A bad batch of fuel? It seems like they fail enough times that it's noteworthy.

 

[Two Mikes]

No, I don't use grease or biodiesel. I'll chalk it up to USLD.

 

[chittychittybangbang]

A little indicator that I remembered: if the tiny torx screws that hold the fuel temp sensor are corroded or other items under the top cover of the pump, then you have a water problem in the fuel.

I had an issue which was traced back to a wire that had rubbed through. On the wiring harness.