key on engine off fuel pressure should be 40-55psi. (if the fuel pump and pressure regulator are working normally) Have you checked to see if you have spark for the spark plugs? You should check for injector pulse too. If you have no spark and/or injector pulse check the crank position sensor. They will go out and the computer won't see the engine cranking over.
Coolant temp can also flood the engine if it's is reading the temp wrong. also look at the connector fro corrosion. (green-like rust in the connector terminals-if they are corroded you should replace the connector too)
Is the security
light flashing or on? If the security
light flashes you may have lost the signal to the passlock module.