1997 Mitsubishi Eclipse shut off while accelerating, won't

Ok here's the background. 2 weeks ago I threw a check engine light. Came back as the leak detection pump so I got it replaced. Now I was cruising about 45mph and went to accelerate and saw the car was slowing down. As I put on a turn signal to get off the road, everything shut off, powersteering went out, and felt like the brakes weren't working either. Once I turned onto the road, the car wouldn't move anymore. We got it pushed off the street and checked everything. It gets air, and spark, so I'm guessing it's a fuel problem. When we took the gas cap off it didn't sound like there was any pressure. There was a little gas in the tank, the light hadn't come on so I don't think it ran out of gas, but we did put a little bit in and still nothing. When trying to start it, doesn't sound like it will turn. The ASE certified tech that looked at it said I should take it back to whoever put the leak detection pump in. I plan on doing that, but it's 45 minutes away so I wanted to see if anyone has any suggestions before doing so.