Car would idle extremely rough upon start up.

Car would idle extremely rough upon start up until I hit the gas, shortly after acted like it wanted to die upon putting in gear at first start up. That same day I would not start after I let it sit for about 20 min after driving. Started up a couple days later, had to turn up my idle to keep running. Sometimes it would only start with starter fluid, but once started it drove wonderful until turned off and had to turn up my idle to keep running. Sometimes it would only start with starter fluid, but once started it drove wonderful until turned off and would not start. Changed the fuel pump, filter ( Regina ), and spark plugs, noticed I miss after, and at first would start but after about 5 to 10 min while in idle it sounded as if it was running out of gas and then would die. Eventually it would only start with starter fluid, and will not stay running if I take my foot of the gas. Please help!':(