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Why does my car start but not stay running when ignition is turned to position it appears be a loose connection or something as slamming the hood only consistent way fix it?

Loose Battery Connection:

- The slamming of the hood may be temporarily resolving a loose connection in the battery terminals or cables.

- Check for any loose, corroded, or damaged battery terminals or cables. Ensure they are securely fastened to the battery posts.

Faulty Ignition Switch:

- A faulty ignition switch can cause intermittent electrical issues, leading to the engine stalling.

- Check the ignition switch for any loose connections, damage, or wear. Replace it if necessary.

Fuel System Issues:

- A problem in the fuel system, such as a clogged fuel filter or a failing fuel pump, can cause the engine to start but not stay running.

- Check the fuel filter and replace it if necessary. Inspect the fuel pump for proper operation.

Problem with the Engine Control Module (ECM):

- The ECM is responsible for controlling the engine's ignition and fuel systems. A faulty ECM can cause the engine to stall or run poorly.

- Diagnose the ECM using a diagnostic tool and repair or replace it if needed.

Electrical Issues:

- Check for any loose, damaged, or corroded electrical connections, such as ground straps or wiring harnesses.

- Ensure all electrical components are securely connected.

Starter Solenoid:

- A failing starter solenoid can cause the engine to start but not stay running.

- Check the starter solenoid for proper operation and replace it if necessary.

Fuel Injector Issues:

- Faulty or clogged fuel injectors can cause the engine to start but not run properly.

- Check the fuel injectors for proper function and replace them if necessary.

Airflow Sensor:

- A faulty airflow sensor can provide incorrect data to the engine control unit impacting the fuel mixture and engine performance

- Check and clean the airflow sensor, or replace it if it's defective

It is recommended to have your vehicle inspected by a qualified mechanic to properly diagnose and fix the root cause of the issue.