* Crankshaft Position Sensor (CKP): This sensor tells the engine computer the position of the crankshaft. A faulty CKP sensor will prevent the engine from getting the right timing signal for ignition and fuel delivery, leading to a start-then-stop situation.
* Cam Position Sensor (CMP): Similar to the CKP sensor, but for the camshaft. A malfunctioning CMP will disrupt the timing and prevent proper combustion.
* Fuel Pump Relay: Even if the fuel pump is working, a faulty relay might not be supplying enough power consistently, causing the engine to stall after a brief moment of operation.
* Ignition Coil(s): A weak or failing ignition coil may provide enough spark initially but not consistently.
* Spark Plugs/Wires: Worn-out spark plugs or damaged ignition wires can create intermittent sparks. A visual inspection for damage is important.
* Mass Airflow Sensor (MAF): A dirty or malfunctioning MAF sensor provides incorrect information about the air intake, leading to poor fuel/air mixture and engine stalling.
* Throttle Position Sensor (TPS): If the TPS is faulty, the engine computer won't get accurate throttle input which can cause erratic fuel delivery and stalling.
* Engine Control Module (ECM): In rare cases, the ECM itself can be faulty, causing inconsistent commands to the fuel and ignition systems. This is less common but possible.
* Low Fuel Pressure: While you say you're getting fuel, the fuel pressure might be insufficient. A fuel pressure gauge test can confirm this.
Troubleshooting Steps:
1. Check for diagnostic trouble codes (DTCs): Use an OBD-II scanner to read any error codes stored in the vehicle's computer. These codes provide valuable clues about the problem.
2. Inspect Spark Plugs and Wires: Check the condition of your spark plugs and wires for wear, damage, or corrosion.
3. Check Fuel Pressure: Use a fuel pressure gauge to measure the fuel pressure. This will rule out low fuel pressure.
4. Test the CKP and CMP Sensors: These can be tested with a multimeter or a specialized scan tool.
5. Check the MAF and TPS Sensors: These can also be tested using a multimeter.
6. Inspect Fuel Pump Relay: Visually inspect the relay and potentially swap it with a known good one.
7. Inspect Ignition Coils: Visually inspect the coils for any damage. Testing may require more specialized equipment.
If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic for diagnosis and repair. Trying to diagnose electrical problems without the proper knowledge and equipment can be dangerous.
