My '95 3.8 liter started yesterday, then I drove it a few feet in the driveway, and it has refused to start since. Last summer I found a hole in the top of the fuel tank so I replaced the tank, the pump, the filter, all the rear components. Right now, I can push on the Schrader valve pin until I turn blue to no effect. Key to Accessory produces a pump hum. So the pump gets power, the car has gas, the fuel rail has no pressure. Is the pressure regulator the most likely problem? Can it go (finger snap) just like that?