Has spark and fuel but won't start.Crank and cam sensors are good. My first attemt of trying to start if I hold pedal to the floor it starts and will bang off the rev limiter for as long as I hold it. I can let up and hammer it again and it will stay running as long as it doesn't drop below 3500 rpms. If I let it die it won't start again. Its flooding out but it has brand new regulater.I tested fuel pressure andits 55 with key in on position and if I get it to start its 55-65 as I'm flooring it from 3500 to redline (only way it will sta running) when I turn it offpressure will drop from 55-25 or so,so I relaced regulater again.same results.pulled fuel rail and turned key on no leaking injectors.help please

Mass air flow sensor was to blame.

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