Ever since i got my 90 crx si i jave never been able to go under 1/4 tank of gas it has a walbro pump from the old owner. What could cause this to hapapen

 

There is a tube and a sock that attaches to the bottom of the stock fuel pump. There is one attached to your new fuel pump... well there is supposed to be at least. chances are it fell off, the tube is too short, or it's not there at all. Its a common problem when replacing a fuel pump with a non OEM unit.

 

your assuming it has a walbro pump or youve seen it yourself?

 

I helped put the tank in i wasnt there when he put the pump in but i died see it be fore then p

 

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/car-dies-when-gas-goes-below-1-4-tank-help-searched-3024291/

read the first post in my thread, exact same problem and I fixed it. Don't try to fix it any other way, because I tried it already!!