Idle air control (IAC) valve: The IAC valve regulates the engine's idle speed. A faulty IAC valve can cause stalling due to incorrect idle airflow control. Clean the IAC valve and check its functionality. If necessary, replace it.
Throttle body: A dirty throttle body with built-up gunk and deposits can disrupt proper airflow and result in stalling. Clean the throttle body and ensure it opens and closes smoothly.
Vacuum leaks: Vacuum leaks in the engine system can introduce unmeasured air, leading to a lean air-fuel mixture and stalling. Inspect all vacuum hoses and connections for leaks. Fix or replace any damaged or loose hoses.
Electrical issues: Faulty ignition components such as spark plugs, spark plug wires, distributor cap, or rotor can cause ignition misfires and stalling. Check and replace any worn or damaged components. Inspect the wiring for loose connections or shorts that may affect ignition or fuel system operation.
Computer problems: In some cases, issues with the engine's computer (ECM) or sensors (such as the throttle position sensor or oxygen sensor) can cause stalling. Diagnose and repair any computer-related problems or sensor malfunctions.
Ensure that all connections and components in the fuel system, ignition system, vacuum system, and electrical system are properly secured, clean, and free from damage or corrosion.
