Weird issue, I'm sure.

I have a 2000 Excursion with the 5.4L V8.
I've read several threads on this forum about intermittent starting issues like the PATS and so forth, so I'm up to date on that. My truck hasn't acted up since I read them.
I'll check those issues when it does, but what I've noticed is that it only seems to do act up when the fuel is low... as in like with the fuel light on.
NO... it's not out of gas.

The motor will crank over good and strong, but not start. I can wait a few minutes and it will start.
When this first happened, I thought that I had luckily run out of gas at the pump. I'd pulled up, turned it off, and then went to restart it to pull to a different pump but it wouldn't start. I fueled up an dit started.
I thought I'd run out of gas, but it did it again today.

I didn't see anything like this on the threads I've read about the PATS, IFSS, Relays or any of those.

 

check the fuel pressure with a gauge on the schrader valve on the fuel rail.

 

They are all different as to how far you can go when the low fuel light comes on. My 2003 F 150 could go about 60 miles after the light came on, in my 2000 Expidition you better pull into the next gas station.

Don't run it below 1/4 tank and you will be doing your fuel pump a big favor. There is no reason to wait until the idiot light comes on.