Possible Causes
* Fuel System Problems:
* Clogged Fuel Filter: A clogged fuel filter restricts fuel flow, causing the engine to stall under load (when you press the gas pedal).
* Fuel Pump Failure: The fuel pump is responsible for delivering fuel to the engine. A failing pump can't keep up with demand, leading to stalling.
* Fuel Line Problems: Cracked or blocked fuel lines can prevent fuel from reaching the engine.
* Ignition System Issues:
* Spark Plug Problems: Worn or fouled spark plugs can misfire, causing the engine to sputter and stall.
* Spark Plug Wires: Damaged or loose spark plug wires can disrupt the spark delivery, leading to misfires.
* Distributor Cap/Rotor (older vehicles): A worn or cracked distributor cap or rotor can interrupt the spark flow.
* Intake System Issues:
* Vacuum Leak: A vacuum leak can disrupt the air-fuel mixture, causing the engine to run poorly and stall.
* Throttle Body Issues:
* Stuck Throttle Plate: A stuck throttle plate can prevent air from entering the engine, causing it to stall.
* Sensor Malfunctions:
* MAF Sensor (Mass Airflow Sensor): A faulty MAF sensor can provide inaccurate air flow data, leading to a poor air-fuel mixture.
* TPS Sensor (Throttle Position Sensor): A faulty TPS sensor may not properly signal the engine control unit about throttle position, causing problems.
What to Do
1. Safety First: Pull over to a safe location immediately. Do not attempt to drive the vehicle.
2. Check Engine Light: Is the check engine light on? If so, you may have a stored diagnostic code.
3. Get It Diagnosed: Take your car to a trusted mechanic. They can use a diagnostic scanner to read any codes stored in the engine control unit and pinpoint the likely cause of the problem.
4. Don't Guess: Trying to fix this yourself could lead to further damage. It's best to let a professional diagnose and repair the problem.
Important Note: It's impossible to diagnose the exact cause of the problem without a proper inspection. This is a potentially serious issue that could be dangerous if left unaddressed.
