akinas-crx

when i go out to start it, it will start then it dies, i do not hear the fuel pump prime. and after a few tries it starts and runs. i noticed that the person that owned it before me had the main relay unbolted and hanging. and before these problems that started yesterday, the car would start everytime with no issues and stay running until the point where i shut it off. and another question of mine is, what main relays will work in a 91 crx si? LS VTEC with
b18 head

any help would be greatly appreciated. thanks.