1998 i30 starts then dies

[rking4540]

HI, just bought a 1998 i30 for son first car.
it starts sometimes after long cranking then dies.
thought it was the anti theft but tried numerous internet solutions to no avail.

Checked codes with OBD II and found
P0100, MAF Sensor, cleaned with MAF cleaner no luck, tested sensor and it has correct voltage
P0325 knock sensor, did not replace internet said could be bad fuel.
P0141, Rear Ho2S Heater Bank 1, think this is o2 sensor

Sprayed with staring fluid and it ran then dies.

Sometimes when cranking it just stop cranking, kind of like the starter shut off.

Does anyone have any ideas??

[NutriaforBreakfast]

Try and see if the fuel pump fuse is not blown

[rking4540]

Ihow do you test it?
I am buying a fuel filter and will buy the too