need assistance

[Microe16]

i removed my intake manifold to replace the gaskets and add an oil catch can on my ka24de afterwards put everything back together and tryed starting it up (it was running before i took off the intake manifold) turned over for maybe a couple seconds struggled to stay on and just shut off i figured it'd be the vacuum lines but they seem to be fine its cranking but not getting any fuel tryed looking for other forums with same issue none could be found.so any suggestions what to check?