Engine Starts But Stops

Ensure electrical harness, connectors and wires are not broken or loose. Ensure battery voltage is at least 11.5 volts. Check main relay and fuel pump relay. Check turbo pressure switch. Check all ECM input signals.
Check Manifold Absolute Pressure (MAP) sensor.
Check Engine Coolant Temperature (ECT) sensor operation.
Inspect induction system. Inspect for leaks downstream of throttle valve. Inspect duct between mass airflow sensor (if equipped) and throttle body.
Check throttle position sensor (TPS).