The firing order for the 2003 Ford Explorer 6-cylinder engine is 1-5-3-6-2-4.
This means that cylinder #1 fires first, followed by cylinder #5, then #3, and so on.
To understand this better:
* Imagine the engine cylinders are numbered 1 through 6, starting from the front of the engine and going towards the rear.
* The firing order tells you the sequence in which each cylinder ignites its fuel-air mixture.
Additional notes:
* This firing order is for the 4.0L Cologne V6 engine commonly found in the 2003 Ford Explorer.
* If you have a different engine in your Explorer, the firing order might be different.
To find a diagram:
* You can find visual diagrams online by searching for "2003 Ford Explorer 4.0L V6 firing order diagram."
* Consult your vehicle's owner's manual or a repair manual for a diagram.
Please remember that it's always best to consult your vehicle's owner's manual or a reputable repair manual for accurate and specific information.