1986 Chevy Camaro not enough gas

Engine Mechanical problem
1986 Chevy Camaro V8 Automatic

i have a 86 camaro with a 305 tpi I got the car they said they put a new fuel pump in it so I got it home with a wrecker and starting testing. Ok tested fuel preasure on rail came up 20 pounds ok then replaced regulator still 20 pounds, then I pulled fuel line off before the fuel rail and tested the pump my gage said 20 pounds for that to ok now im stumped if I spray gas into it I can get it to run it run rich and like crap when its running when I spray gas in it its wants to run good im lost on this thing. The pump, filter, and regulator are new, im lost, thanks