1. Faulty Fuel Pressure Regulator: A malfunctioning fuel pressure regulator can cause insufficient fuel pressure, leading to the engine sputtering and stalling when put into gear.
2. Clogged Fuel Filter: A blocked fuel filter can restrict fuel flow, causing the engine to run lean and experience stalling issues under load.
3. Faulty Ignition System Components: Ignition system components, such as spark plugs, spark plug wires, or the ignition coil, can cause sputtering and stalling if they are worn out or malfunctioning.
4. Vacuum Leak: A vacuum leak can lead to a lean fuel mixture, causing the engine to stall when put under load.
5. Dirty Throttle Body: A dirty throttle body can affect air-fuel mixture control and cause the engine to sputter and stall.
6. Transmission Issues: Transmission problems, such as a slipping transmission or a faulty torque converter, can also cause the engine to stall when put into gear.
7. Mass Airflow (MAF) Sensor: A faulty MAF sensor can provide incorrect air flow readings to the engine computer, resulting in an incorrect fuel mixture and stalling issues.
8. Fuel Pump: A failing fuel pump may not be able to deliver enough fuel to the engine, leading to sputtering and stalling under load.
9. Faulty Oxygen Sensors: Oxygen sensors play a crucial role in the fuel injection system, and their failure can cause the engine to run lean or rich, leading to stalling problems.
10. Computer (PCM) Issues: Problems with the engine's computer (Powertrain Control Module) or its programming can affect engine performance and cause stalling when put into gear.
Recommendation:
Given the complexity of potential causes, it is advisable to have the vehicle inspected by a qualified mechanic to accurately diagnose and resolve the issue.
