How to tell if my fuel pump is going out.

[richards72chevy]

My wifes 01 blazer stalled out on her today.She made it home.I took it on a drive and it ran fine for a few miles then the rpm dropped to 1500 then 500 then it died.I was lucky because it broke down in front of my grand parents house.It restarted but it was popping and running rough for a minute died and wouldnt restart.I let sit for a little bit it would turn over but not start.I could hear the pump coming on.I poured some gas down the throttle body it fired rite up.I could hear the pump running.I can also hear the engine stop running for just a second and the fuel pump quits making noise.The problem is it happens so fast i cant tell if the pump is making the engine stop running or if it would be something in the ignition.How could i tell?I replaced the fuel pump 2 years/30,000 miles ago.