1. Ignition System Issues:
* Crankshaft Position Sensor (CKP): This sensor is crucial for the engine's timing. A failing CKP sensor will prevent the engine from continuing to run after starting. It's a common culprit for this exact symptom.
* Cam Position Sensor (CMP): Similar to the CKP sensor, a faulty CMP sensor disrupts the engine's timing and can cause the engine to die.
* Ignition Coil(s): A failing coil can cause misfires and eventually lead to the engine stalling. Consider testing the coils individually if you have the tools.
* Ignition Module: This component controls the ignition coils. A problem here can affect multiple cylinders or even cause a complete ignition failure.
2. Fuel System Problems:
* Fuel Pump: A failing fuel pump might provide sufficient pressure for a short initial burst, but then fail to maintain the pressure needed to keep the engine running. Check fuel pressure.
* Fuel Filter: A clogged fuel filter can restrict fuel flow, leading to similar symptoms. This is a relatively cheap and easy component to check and replace.
* Inertia Switch (Crash Sensor): This safety device cuts off fuel supply in a collision. It's possible it's accidentally tripped, even without an accident.
3. Electrical System Problems:
* Alternator: While it's less likely to cause an immediate stall, a failing alternator might not provide enough power to keep the engine running, especially after a brief period. The gauges going to zero is a strong indicator of an alternator problem, or a more serious problem with your battery circuit.
* Battery Connections: Check the battery terminals and cables for corrosion or looseness. Poor connections can lead to intermittent power loss.
* Wiring Harness: A faulty wire within the engine harness can cause intermittent electrical problems that manifest as your described symptoms. This is harder to diagnose.
* PCM (Powertrain Control Module): While less common, a failing PCM can cause a variety of electrical and fuel delivery problems. This is usually a more expensive fix.
Troubleshooting Steps:
1. Check the battery terminals and connections: Clean and tighten them.
2. Check the fuel pressure: This requires a fuel pressure gauge. Low pressure points to the fuel pump, filter, or even a clogged fuel line.
3. Inspect the inertia switch: If you find it, push the button to reset it.
4. Check the fuel filter: Replace if dirty.
5. Listen carefully when cranking: Does the fuel pump prime (you should hear a whirring sound)?
6. Scan for trouble codes: Use an OBD-II scanner to retrieve diagnostic trouble codes (DTCs). These codes can pinpoint the source of the problem.
Important Note: If the gauges go to zero when the engine dies, it strongly suggests a significant electrical issue, and you should get it diagnosed and repaired by a qualified mechanic as soon as possible, to avoid further damage and to prevent safety hazards. Attempting repairs on the electrical system of a vehicle can be dangerous if you lack the proper knowledge and tools.
