No problem whatsoever. You can ask as many questions as you want. LOL
I feel cycling the switch the first time allowed the fuel pump to build enough pressure to start it. If you tried it after replacing the filter, it may have required more time because the filter needed to refill and build pressure.
If I have to guess, I feel there is fuel pressure drop-off. When the engine is off long enough, the pressure is dropping too much and it won't start.
Try the key cycling again now that it has run and let me know if it works.
Also, the next step would be to test the fuel pressure to see if it jumps to the manufacturer's specifications.
If you look below, I attached the directions. The last pic has the specs. Also, the 6.0L wasn't offered in the F series. It was in the E series. Could you confirm that for me?
Let me know.
See pics below.
Images (Click to make bigger)
Monday, August 22nd, 2022 AT 9:03 PM