Why does 1998 jeep Cherokee not run unless gas tank is at least half full?

2.5L or 4.0L? engine.
ever do a full service on this car , with a fuel filter.
or wrong gas cap, does car run ok cap off? or loose?
ignore cap off DTC errors. EVAP errors when done, ok?
start with basics.
then check fuel pressure, with a 1/4 tank, is it spec pressure with that brand new filter? yes/no.

the filter is part of the top of pump at top of the FP reg. in tank.
that be how its done. no need to guess. at all.
in this case, the pressure test is after, the cap checks.
the wrong cap will have a missing, cap vacuum breaker this cause
the pump to fail (it cant suck in a hard vacuum at all, get a new cap)

FSM spec, a the fuel rail for pump pressure,
Start the vehicle and note the pressure reading at idle which should be 31 psi (214 kPa).

if the car stalls with 31 PSI pressures , its NOT THE PUMP.
easy huh? just one tool and bam ,hard cold diagnostic facts.
evidence.
the tool can be had for $20