* Loose or damaged wiring: The jarring from the pothole could have dislodged a wire connection, especially near the battery, ignition system, or under the dash. A broken wire in a critical circuit (like the power supply to the engine control module (ECM)) would cause the engine to die. This is a very common cause.
* Ignition switch: A worn or failing ignition switch could be jolted into a non-functional position by the impact.
* Alternator: A loose or damaged alternator could be prevented from charging the battery properly, causing the engine to stall after the jolt drains the remaining power. A failing alternator could also be more prone to failure after a significant impact.
* Distributor (if equipped): Older S10s might have distributors. A hard jolt could dislodge the cap or rotor, or even damage the internal components, leading to engine failure.
* Sensor failure: Various sensors (crankshaft position sensor, camshaft position sensor, etc.) are crucial for engine operation. A hard hit could damage or dislodge one, causing the engine to shut down. These are generally less likely to be directly jolted loose but could be damaged internally.
* Fuel system issues: Though less likely, a severe impact could damage a fuel line, pump, or filter, interrupting fuel delivery.
* Broken ground strap: A loose or broken ground strap connecting the engine to the chassis could interrupt the electrical circuit, causing the engine to stall.
Troubleshooting Steps:
1. Check for obvious loose or broken wires: Start by visually inspecting wiring harnesses, especially near the battery and ignition system. Look for any broken wires, loose connections, or frayed insulation.
2. Inspect the ignition switch: See if the ignition switch feels loose or wobbly.
3. Check the alternator: Have the alternator tested at an auto parts store to ensure it's charging properly.
4. Listen for unusual noises: When trying to start the truck, listen carefully for any clicking or grinding noises that might indicate a problem with the starter or other electrical components.
If you're not comfortable doing this yourself, take your S10 to a mechanic. Describing the problem (shutting off when hitting a pothole) will help them diagnose the issue more efficiently. Remember safety first – always disconnect the negative battery terminal before working on the electrical system.
