* Cam Position Sensor (CMP Sensor): Similar to the crankshaft sensor, the camshaft sensor tells the engine's computer the position of the camshaft. A faulty CMP sensor can lead to misfires and stalling.
* Mass Airflow Sensor (MAF Sensor): This sensor measures the amount of air entering the engine. A dirty or faulty MAF sensor can provide inaccurate readings, leading to a lean fuel mixture and stalling. Cleaning it is a cheap first step before replacement.
* Throttle Position Sensor (TPS): This sensor tells the engine control unit (ECU) the throttle's position. A faulty TPS can cause erratic idling and stalling.
* Ignition System Problems: This could include faulty ignition coils, spark plugs, or wiring. Weak sparks can cause misfires and stalling, especially under load.
* Fuel Pump: While less likely if the fuel filter is new, a weak fuel pump might not be supplying enough fuel, especially under stress (e.g., acceleration). It might work fine at idle but fail under load.
* Vacuum Leaks: A leak in the intake manifold or vacuum lines can disrupt the air-fuel mixture, leading to stalling.
* ECU Problems: Although less common, a problem with the engine control unit itself could be causing the issue. This is a more expensive and complex diagnosis.
* Wiring Harness Issues: Damaged or corroded wiring, particularly in the engine bay, can cause intermittent problems.
Troubleshooting Steps:
1. Have the vehicle scanned for diagnostic trouble codes (DTCs): This is the most important first step. A mechanic with a professional-grade OBD-II scanner can read codes that might pinpoint the problem.
2. Check for vacuum leaks: A visual inspection of vacuum lines and the intake manifold for cracks or loose connections is recommended.
3. Inspect the ignition system: Check the spark plugs, ignition coils, and wiring for damage or wear.
4. Clean or replace the MAF sensor: This is a relatively inexpensive and easy fix to try first.
Important Note: Since the vehicle is stalling while in motion, this is a serious safety concern. Do not continue to drive the vehicle until the problem is diagnosed and repaired by a qualified mechanic. The risk of stalling in traffic or on the highway is significant. Professional diagnosis is strongly recommended.
