1993 Oldsmobile Cutlass trouble cranking

I used the car daily. I had stopped at a store and when I got in the car to come home it started sputtering/surging like it was running out of gas. Because the digital dash doesn't work most of the time I thought it might be out of gas and stopped to put gas in it. It cranked up again but was still sputtering/surging. I made it the 6 miles home, shut it off, then it wouldn't crank again. We replaced the fuel pump and fuel filter. Cleaned the fuel injectors. Got it running again when a belt broke because a pulley had seized so we replaced the pulley and belt. Next came a new battery. Now, the car will just turn over unless you spray a good amount of starter fluid in it, then it will fire right up but the throttle is stuck wide open until it warms up after about a minute or so. After that it runs normally and you can shut if off and crank it back immediately just fine. But if you wait a minute or two you have to spray starter fluid in it again. I'm at my wits end with this car and any suggestions would be greatly appreciated.