To find the correct specifications, you must identify the engine in your specific van. Look for an engine code stamped on the engine block itself (often near the distributor or valve cover). Once you have the engine code, you can:
1. Consult a repair manual: A Haynes or Chilton repair manual specific to your year and engine will give you detailed tune-up specifications, including:
* Spark plug gap: The correct distance between the spark plug electrodes.
* Spark plug type: The specific type of spark plug recommended (heat range, etc.).
* Ignition timing: The precise timing setting for optimal combustion.
* Distributor points gap (if applicable): Older engines might use points; these need to be gapped correctly.
* Carburetor adjustments (if applicable): If your van has a carburetor, specific adjustments will be needed.
* Air filter replacement: Frequency and type of filter.
* Fuel filter replacement: Frequency and type of filter.
2. Use an online parts catalog: Websites like RockAuto or AutoZone allow you to search by year, make, model, and engine to find the correct parts, which may list some specifications.
3. Check your owner's manual (if you have it): The owner's manual might have basic maintenance recommendations, but detailed tune-up specifications are typically found in a repair manual.
Without knowing the engine, providing accurate tune-up specifications is impossible. Providing incorrect information could damage your engine.
