2000 Sephia won't start and run

Hello I have a 2000 Kia Sephia base model and it recently has had trouble starting. At first it would start every once in a while run for a day or two then stop starting. Eventually it stopped starting all together. I replaced the battery and the fuel filter and a mechanic told me it has most likely it was the fuel pump. So I had the fuel pump replaced and to prime the fuel pump I tried starting the car. I tried starting it a couple times and the battery died so I got a jump and tried starting it again and the car finally started, I revved the engine a little while in neutral and all seemed well however after I stopped stepping on the gas pedal the car suddenly turned off (or stalled?) I tried starting it again and it started, ran in neutral for about 30 second then turned off again. This has been the result every time I try starting it what could be the problem now? This Kia has been given me nothing but trouble lately, I just want to sell it and buy a Jeep please help :crying:

Hello I have a 2000 Kia Sephia base model and it recently has had trouble starting. At first it would start every once in a while run for a day or two then stop starting. Eventually it stopped starting all together. I replaced the battery and the fuel filter and a mechanic told me it has most likely it was the fuel pump. So I had the fuel pump replaced and to prime the fuel pump I tried starting the car. I tried starting it a couple times and the battery died so I got a jump and tried starting it again and the car finally started, I revved the engine a little while in neutral and all seemed well however after I stopped stepping on the gas pedal the car suddenly turned off (or stalled?) I tried starting it again and it started, ran in neutral for about 30 second then turned off again. This has been the result every time I try starting it what could be the problem now? This Kia has been given me nothing but trouble lately, I just want to sell it and buy a Jeep please help :crying:
It could be a bad fuel pressure regulator. Go to the parts store like Advance or Auto Zone borrow a fuel pressure pressure test gage. Test the pressure as it could be an electrical problem. These two parts stores will also check the computer for codes free.