* Distributor Cap and Rotor: These are common failure points. Inspect them carefully for cracks, burns, or corrosion. Even minor damage can prevent spark from reaching the plugs. Replace them if anything looks questionable.
* Spark Plugs and Wires: Check the spark plugs themselves. Are they fouled (covered in carbon or oil)? Are they gapped correctly (consult your owner's manual for the proper gap)? Inspect the spark plug wires for cracks, damage, or loose connections. A weak or broken wire can prevent a good spark. Consider replacing the wires if they're old or show any signs of wear.
* Ignition Coil Wire Connection: Make sure the wire connecting the coil to the distributor is securely attached at both ends. A loose connection can interrupt the spark.
* Distributor Issues:
* Worn Distributor Shaft: The distributor shaft can wear over time, causing the rotor to not spin correctly, resulting in a weak or intermittent spark.
* Distributor Timing: While unlikely to be the *sole* cause if you have spark at the coil, an extremely off timing chain can sometimes prevent the engine from firing properly. This is more difficult to check.
* Fuel System: Even with spark, the engine needs fuel.
* Fuel Pump: Check if the fuel pump is functioning. You might hear it prime when you turn the key to "on" (before cranking).
* Fuel Filter: A clogged fuel filter will prevent fuel from reaching the engine.
* Fuel Injectors (if fuel injected): If it's fuel-injected, there could be a problem with the injectors, fuel pressure regulator, or the computer controlling them. This requires more specialized testing.
* Crankshaft Position Sensor (CKP sensor): In some 1989 models, a faulty CKP sensor (or its wiring) won't allow the engine computer to trigger the ignition system properly. This is a more advanced issue requiring testing.
Troubleshooting Steps:
1. Visual Inspection: Start with a thorough visual inspection of the distributor cap, rotor, spark plug wires, and spark plugs. This is the easiest and often most revealing step.
2. Spark Plug Test: Remove a spark plug wire, attach it to a good spark plug (held against the engine block for grounding), and crank the engine. You should see a strong, consistent spark. If you don't, the problem is likely in the distributor, ignition module (if it has one), or wiring before the coil.
3. Fuel Pressure Test: Check your fuel pressure. You'll need a fuel pressure gauge and the proper adapter for your fuel rail.
Important Note: If you're not comfortable working on your vehicle's electrical or fuel systems, it's best to take it to a qualified mechanic. Working with automotive electrical systems can be dangerous if not done properly.
