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What is cylinder numbering order in a 2004 F-150 V8 Triton block?

The 2004 Ford F-150 4.6L and 5.4L Triton V8 engines use a front-to-rear, driver's side to passenger's side numbering system.

Therefore, the firing order influences the numbering, but the *physical* cylinder numbering goes:

1-3-5-7 (Driver's side)

2-4-6-8 (Passenger's side)

Keep in mind that this is the *physical* cylinder numbering. The firing order is a different sequence that describes the order in which the cylinders ignite. You'll need a workshop manual or reliable online resource to find the exact firing order for your specific engine displacement (4.6L or 5.4L).