* Fuel System Problems:
* Fuel Pump Failure: A common problem in older vehicles. The pump might have given out entirely, or it could be intermittently failing.
* Clogged Fuel Filter: A clogged filter restricts fuel flow, leading to stalling.
* Fuel Delivery Issues: Problems with the fuel lines, injectors, or pressure regulator can prevent the engine from receiving sufficient fuel.
* Ignition System Problems:
* Distributor Cap/Rotor Issues: Worn or damaged components in the distributor can interrupt the spark delivery to the spark plugs. This is especially likely in a vehicle of that age.
* Ignition Coil Failure: The coil provides the high voltage needed for sparking. A failing coil can cause intermittent or complete engine failure.
* Spark Plugs/Wires: Worn or faulty spark plugs or wires will prevent proper combustion.
* Electrical System Problems:
* Alternator Failure: If the alternator died, the battery could have drained completely, leaving you unable to restart the vehicle.
* Battery Issues: A weak or dead battery can also cause stalling and prevent restarting. Even if it started initially, a weak battery might not have enough juice to restart after stalling.
* Loose or Corroded Connections: Poor connections in the electrical system can disrupt power flow to essential components.
* Other Potential Issues:
* Crankshaft Position Sensor (CKP) Failure: This sensor tells the computer the engine's rotational position, and a failure can prevent starting.
* Computer/ECU Problems: While less common, a malfunctioning computer can cause various engine issues.
* Overheating: Severe overheating can cause damage that prevents starting.
Why it might *now* start: Sometimes, intermittent problems might temporarily resolve themselves. For example, a loose connection might have vibrated back into place, or a component might have cooled down enough to function again (though this is less likely). However, this doesn't mean the underlying problem is fixed.
What you should do: It's crucial to have a qualified mechanic diagnose the problem. Attempting to fix it yourself without proper knowledge could lead to further damage or injury. Ignoring the issue could lead to a more serious, and more costly, breakdown in the future.
