98 silverado wont start help needed.

I just finished replacing the intake gasket that was leaking and got it all back together and now it wont start. Tried a bit of starting fluid and it fired right up then stopped when it ran out. Im thinking maybe check the fuel pressure once I get a gauge. I had the fpr off and the fuel lines were off when cleaning inside the upper intake you think maybe the 0-rings are not sealing now? I did not remove the injectors or anything from the cluster.

Check for fuel pressure first make sure everything is properly reconnected.

Thanks ill get the pressure checked and report back.

Its fixed! I checked the fuel pressure and that was fine. Decided to go ahead and order the new mfi unit from O'Rileys put that in and its allll smooth now.