Scion tC starts and dies unless gas pedal is pressed, possibly related to battery reinstallation on Scion tC

Some Scion tC owners report experiencing issues where the vehicle starts and dies unless the gas pedal is pressed, which may be related to battery reinstallation. These owners often find that the idle air control valve may need a reset, requiring them to maintain a 1500 RPM idle for a few minutes. Additionally, they report the importance of checking for air leaks in the system, ensuring that all clamps are tight and the mass airflow sensor is functioning properly, as excessive unregulated air can lead to engine shutdown. Insufficient fuel pressure is another common concern, often attributed to a failing fuel pump that may start the engine but not keep it running. Owners also note the necessity of inspecting electrical components such as fuses, relays, and battery cables, as loose or corroded connections can impact engine performance. Lastly, some have found that adjusting the throttle position sensor and MAP sensor while cranking can help, though caution is advised to avoid flooding the engine.