This has been happening for a while now, i have been trying to avoid it, but i fear my SH!TBOX is in too much pain

Well when the fuel gauge shows the fuel level at 1/3 remaining. The car sometimes goes into a spasm, it is an automatic car, but it feels like the car is stalling.

More detail:

I begin to slow down as a near a red light, in the process of slowing down and coming to a complete stop, the engine shakes and stutters and feels like it is going to turn off, but it eventually quietens down and settles. If you continue to use up the fuel, the problem becomes worst and the engine has even stopped on me before.

Problem:

I therefore have to always keep the fuel above 1/3 or else i fear for my life.

Solution:

Any help would be great thanks.

I heard it might be the fuel pump so i got a quote from this site for an aftermarket fuel pump priced at $176:

http://www.petroject.com.au/performance.html

Are there any other parts of the car that would be causing the problem? Please don't speak in real technical language as i am just a beginner when it comes to cars.

Thanks, Chris