It is hard to see voltage with meter. Ocsilloscope is better, unfortunately not everone has one on hand.

Have you checked fuel pressure? If you have good pressure, then I would suspect the injectors. Perhaps rusted closed due to water? I would perform an injector cleaning prior to replacement. See if the chemical opens them up.

Anyway, first check for fuel pressure and resubmit post if pressure good.

 

Sounds kind of like what happened with my car, I would probably replace the injectors.

My car it turned but would not start. But also I had the battery replaced first. But since you were able to start it that one time, the battery should be fine just get some new injectors

 

Turn your key in start position and wait a few secs w/o starting your engine .You should hear some "whirring" noise .If not check your fuel pump or relay .