My 2003 tribute turns over fine no codes other than mass flow and o2 sensor. I drove it for 30 min no problem now cannot start like it is getting no fuel

. Verify that the CEL comes on for 2 seconds and then goes out, when the ignition switch is turned to ON. If not, there may be a problem with the ECM.

. Check for spark. If none, check the Crankshaft Position Sensor, wiring, and connector.

. Check for fuel--can you hear the fuel pump run, when you turn the ignition switch to ON?

. Check all under hood and under dash fuses with a test light or multimeter.

. Check/replace the MAF Sensor and Oxygen Sensor. MAF Sensors can cause some vehicles not to start or to die.