1990 Fuel Injectors Please Help

My son owns a 1990 Jeep Cherokee Laredo Automatic trans 4.0 Liter. He found 3 leaking injectors (from inside out threw the electrical connector) and decided to replace them all. Now it won’t start. There is fuel on the rail and the truck ran well before the replacements. Is there any bleeding that needs to be done of the injectors? The only other thing that could have happened is fouled plugs due to excessive injector cleaner left in the intake while cleaning injector ports.
Any ideas would be greatly appreciated.
:banghead:

If he tried to clean out the bosses before installing the injectors again, then the plugs are likely fouled. Remove them and inspect, change as needed (or simply change them all anyway). While the plugs are out, I'd disconnect the ign coil and crank the engine over to blow out any other crud in the cyl.

Make sure to connect the correct injector on the harness.

First...if your going to replace 3 then you might as well replace ALL of the injectors....You are going to have to dismantle the whole thing so while you have it apart change ALL the injectors and install NEW o rings
This site can answer injector questions....and has several options for injectors
http://www.fiveomotorsport.com/Injector_Sets.html

JUST MAKE SURE YOU LABEL THE CONNECTORS FOR THE INJECTORS BEFORE YOU DISCONNECT THEM.....