fuel pump is coming out. what about fuel requirement?

hi. i have maked fuel pump test as its shown in manual (how much fuell will flow through the fuel pressure regulator at 12v after 10 seconds). it should be 230cc. my result was 40cc :(. fuel filter is changed not long time ago. so its fuel pump failure? i maked fuel pressure test too and the interesting thing is fuel pressure is good: 36-41 psi (as you know depends on pressure regulator). the probelm is ~27-28 litres (about half a tank) for 100 miles. I found another fuel pump in a garage(i don't know for what car is it), and put it to my car. then i maked fuel pump retest and the result was 180 cc. so my Q: do low millage depend on the weak fuel pump?? i hope you will understand my poor english :) thanks

low mileage can depend many things.
If you are saying that your fuel pump wasn't flowing enough fuel i replace it with a new one. Get a new one from a dealer or autoparts store.

you can try to change it out....100 miles per half a tank is real bad...you car is running way to rich