Question 1/4 tank problem

[GLENNF250]

Hey, I searched couldn't find anything related to this; last 2 tanks, 1st tank reminder light and buzzer did not come on or sound, truck ran rough and did not want to move from pump. Only after 3-5min. of idle did it clear up and ran fine for 2days of highway driving.
2nd tank at 1/4; was below 1/4 tank about 1/8..still no low fuel warning,pulled in to station filled tank while idling, pulled about 50 feet and started stumbling. After 1/4mile cleared right up.
After clearing up, engine responds well and no idle problems. Anyone else have this problem??

truck;2007 6.0l
No add on's or chip

 

[Yooper75]

Sounds like a fitting sucking air in the tank when the fuel level gets to low.

 

[GLENNF250]

That sounds like a good place to look. If it does 1 more time, I'll drop the tank. Was told today that the o-ring at the filter in the electric pump could be a problem to. The fuel filter will be changed tomorrow. Thanks for your input.