Simple Checks (Do these FIRST):
* Battery: This is the most common culprit. Check the battery terminals for corrosion (clean them with a wire brush if needed). Test the battery voltage with a multimeter. It should read around 12.6 volts when fully charged. If it's low, the battery may need charging or replacing.
* Starter Motor: Try tapping the starter motor (lightly!) with a hammer or wrench while someone turns the key. A weak or failing starter can sometimes be jolted into action. If this works, the starter needs replacing.
* Ignition Switch: Make sure the key is fully inserted and turning properly. A faulty ignition switch can prevent power from reaching the starter.
* Fuses and Relays: Check the fuses and relays related to the ignition system. Consult your owner's manual for their locations and diagrams. A blown fuse will be visually clear (broken filament).
* Fuel: Is the fuel tank nearly empty? A low fuel level can sometimes cause starting problems.
More Involved Issues:
* Fuel Pump: The fuel pump might be failing to deliver fuel to the engine. You might hear a whirring sound from the fuel pump when you turn the key to the "on" position (but not cranking). Lack of this sound suggests a problem.
* Fuel Filter: A clogged fuel filter will restrict fuel flow, preventing the engine from starting.
* Distributor Cap and Rotor: These components distribute the high voltage to the spark plugs. Corrosion or wear can cause misfires and prevent starting. Inspect for cracks, corrosion, or worn contacts.
* Spark Plugs and Wires: Worn or fouled spark plugs can prevent the engine from igniting the fuel-air mixture. Inspect for damage or discoloration. Worn spark plug wires can also cause misfires.
* Ignition Coil: The ignition coil provides the high voltage needed to fire the spark plugs. A faulty coil will prevent the engine from starting.
* Alternator: While not directly related to starting, a faulty alternator won't charge the battery, leading to starting problems if the battery is already weak.
* Sensors: Various sensors (e.g., crankshaft position sensor, camshaft position sensor) are critical for the engine's operation. A faulty sensor can prevent the engine from starting. This is less likely on a simpler 1985 model, but possible.
* Wiring Issues: A short circuit or broken wire in the ignition system can also prevent starting. This often requires tracing wires.
Troubleshooting Steps:
1. Start with the simple checks: Battery, fuses, fuel level.
2. Listen for unusual sounds: A clicking sound might indicate a battery or starter problem. A whirring sound might indicate the fuel pump is working (or not).
3. Check the basics: Ensure you are turning the key to the correct position (sometimes a second turn is required).
4. Consult a repair manual: A Haynes or Chilton repair manual for your specific model year will be invaluable. They provide diagrams and troubleshooting guides.
5. Seek professional help: If you're not comfortable working on your car yourself, take it to a mechanic. Describing the symptoms accurately will help them diagnose the problem effectively.
Remember safety first! Disconnect the negative battery terminal before working on any electrical components. If you're unsure about any step, it's best to seek professional assistance.
