* Faulty ignition switch: The ignition switch is responsible for sending power to the starter and other electrical components when you turn the key. If the ignition switch is faulty, it may not be making proper contact and causing the engine to stall when you release the key.
* Bad ground connection: A bad ground connection can prevent the engine from getting the power it needs to stay running. Check the ground connections at the battery, engine, and chassis to make sure they are clean and tight.
* Starter solenoid: The starter solenoid is responsible for engaging the starter motor. If the starter solenoid is faulty, it may not be engaging properly and causing the engine to stall when you release the key.
* Fuel pump: If the fuel pump is not working properly, it may not be providing enough fuel to the engine. This can cause the engine to stall when you release the key.
To further diagnose the problem, you can try the following:
* Check the battery voltage: Make sure the battery has enough voltage to start the engine. A battery that is too low on voltage may not be able to provide enough power to the starter and other electrical components.
* Try starting the car in neutral: If the car starts in neutral but not in park, this could indicate a problem with the neutral safety switch.
* Check the fuel pressure: Use a fuel pressure gauge to check the fuel pressure at the fuel rail. If the fuel pressure is too low, this could indicate a problem with the fuel pump or fuel filter.
If you are not able to diagnose the problem yourself, you may need to take the car to a mechanic for further diagnosis and repair.
