Hello thank you I put a new engine in my izusu trooper the one I took out had a bad knock but it run put the new one in will only run when I squirt gas into intake checked fuel pressure looked good wondering if injecters are getting pulse or what they need to inject fuel and how to check them would hate to take to machanic shop please help my 1 time with askme

Make certain that all the connectors are on an tight.
The fuel injectors need both power and ground. Check that when you installed the replacement engine that all the ground are connected, clean and tight.
The best method to test the injector harness is with a special tool called a noid light connected at each injector connector.

Like CaptainRich suggested, make sure everything is plugged back in. Also check all your fuses to be safe; one may have blown when you reconnected everything.