99 silverado changed fuel pump n filter and wont stay running.

Check the fuel pump relay. Hope that helps! Jim

I did and its pumping fuel like crazy just not at fuel rail

When I take line from filter off and turn key it shoots lots of gas

No its correct. It ran fine and parked it in garage and 2 days later came out to start it and it only starts and dies starts and dies. So I changed pump and filter and same thing. When I disconnect line from fuel rail and turn key on it sprays fuel with high pressure. When I pour gas in intake, it stays running.

Question? If I take the fuel pressure regulator off should I be able to pour gas out of the vacuum port on it?

Could it be a mass air, dirty coils of when I pour gas in the intake it stays running?

I swapped out all the relays and same thing

Also to clarify, it sprays fuel at the line that connects to fuel rail haven't had much pressure out of the valve stem on fuel rail

If you remove the vacuum hose at the fuel pressure regulator and there's gasoline in the vacuum hose the fuel pressure regulator is shot. Hope that helps! Jim

It's not in the vacuum hose, but when I take the regulator all the way out and turn it over gas comes out where the vacuum hose hooks to it