* 4.6L V8: The firing order is typically 1-5-4-8-6-3-7-2
* 5.4L V8: The firing order is typically 1-6-5-4-3-2-7-8
To determine which engine you have, check your vehicle's documentation or look for an engine code on the engine itself (usually a sticker or stamped metal tag). Once you know the engine size, you can be sure of the correct firing order.