What can possibly be keeping my Probe from running?

It was running fine with no signs of issues, and then when we tried to start it one day, it wouldn't run. I put a brand new fuel pump in it, then I put a new fuel filter on it. It still would not run longer than a couple of seconds and then cut off. It is getting spark. I had a friend who works on cars take a look at it. He opened the air filter compartment and sprayed engine starting fluid in it while I cranked it. It started and would run as long as he kept squirting the fluid in. When it ran out, the car shut off. So, I bought a new Fuel pump relay and put it in. The car immediately started, ran for 2-3 minutes and cut off. Now, it won't start again. What could be doing this?