1. Consult your owner's manual: The most reliable source for this information is your vehicle's owner's manual. It will have detailed diagrams and specifications for your specific model.
2. Look for a sticker under the hood: Many vehicles have a sticker under the hood that lists the firing order. Look for a sticker on the engine or near the radiator.
3. Search online: Many websites offer free repair manuals and information, including diagrams and firing orders. Search online for "2003 Ford Explorer 4.0L V6 firing order" and you'll find several resources.
4. Use a repair manual: If you have access to a Haynes or Chilton repair manual, they often have detailed diagrams and specifications for specific vehicle models.
The firing order for a 2003 Ford Explorer 4.0L V6 is typically:
1-5-3-6-2-4
Keep in mind that it's always best to double-check the information using your owner's manual or another reputable source, as there can be variations between model years and configurations.
