So I was driving home Wednesday the car misfired for a few seconds the check engine light flashed and it died. The battery has 12.8 volts, the motor has fuel pressure, I have spark at the coils and the end of the plug wires. The car cranks and sometimes stumbles like its going to start but never does. What the hell is wrong with it.

I have done no mods to the engine for about 18 months now, its the same L67 that came with the car. 95K on the clock