no idle?

i got a 96 black top im missing the fuel pump for the SR its just the one for the KA my inkectors are 550cc and all pipeing has been made bigger the exaust isnt on yet just the elbow with the 02 sensor is there would that have anything to do with it? if i blip the throttle a little i can get it to stay running and it fires up right away any suggestions

and none of my lights work untill after my car is running but i just did the dash harness colour to colour the wiring was done when i got it

You need a walbro fuel pump