Vacuum leaks: Vacuum leaks can cause the car to stall after idling for 15 minutes by letting air into the intake manifold, which can lead to a lean fuel mixture and engine stalling.
Idle air control valve: The idle air control valve (IACV) is responsible for controlling the amount of air that bypasses the throttle body at idle. If the IACV is faulty, it can cause the engine to idle too low or stall.
Throttle body: A dirty throttle body can also cause the car to stall after idling for 15 minutes by restricting airflow to the engine.
Fuel pressure regulator: If the fuel pressure regulator is faulty, it can cause the fuel pressure to be too low, leading to a lean fuel mixture and engine stalling.
Air filter: A dirty air filter can also cause the car to stall after idling for 15 minutes by restricting airflow to the engine.
Oxygen sensor: A faulty oxygen sensor can cause the car to stall after idling for 15 minutes by providing incorrect information about the air/fuel mixture to the engine computer, which can lead to a lean fuel mixture.
