ok is it not starting at all, or is it just not starting and staying started?
to fire, you must have, COMPRESSION, FUEL, and SPARK. you don't have to have a volt meter to see if they injectors are working. check and see if you have fuel pressure, having fuel pressure does not mean your getting fuel into the engine, carefully (stay away from the belts, as in come in from the drivers side) reach under the intake and grab each injector while you have someone else turn the engine over, if you can feel each one ticking then they are firing, you can check the spark by pulling the plug boots off by using a timing light on each wire and seeing if it pulses the light, or a couple other ways like pulling the wires and seeing if the plug is firing, do a compression test and see if there is compression. if you do that, then your camshaft is probably 180 degrees out or something similar.