The idle air control (IAC) valve is responsible for regulating the amount of air that enters the engine at idle speed. If the IAC valve is faulty, it can cause the engine to stall when the vehicle is put into drive. This happens because the engine is not getting enough air, causing the idle to become unstable and the engine to eventually shut off.
2. Dirty Throttle Body
The throttle body is a valve that controls the flow of air into the engine. If the throttle body becomes dirty, it can restrict the airflow, causing the engine to stall when the vehicle is put into drive. This happens because the engine is not getting enough air, causing the idle to become unstable and the engine to eventually shut off.
3. Vacuum Leak
A vacuum leak can also cause the engine to stall when the vehicle is put into drive. This happens because the vacuum leak is drawing unmetered air into the engine, causing the idle to become unstable and the engine to eventually shut off.
4. Faulty Fuel Pump
A faulty fuel pump can also cause the engine to stall when the vehicle is put into drive. This happens because the fuel pump is not delivering enough fuel to the engine, causing the engine to run lean and eventually stall.
5. Faulty Oxygen Sensor
A faulty oxygen sensor can also cause the engine to stall when the vehicle is put into drive. This happens because the oxygen sensor is not providing the correct feedback to the engine computer, causing the engine to run rich or lean and eventually stall.
If you are experiencing this issue, it is best to have the vehicle diagnosed by a qualified technician. They will be able to identify the exact cause of the problem and recommend the best course of action.
