Right rear cylinder. The number 1,3 & 5 cylinders are on the right side of engine as seen from pilot seat. Number 2, 4 & 6 cylinders are on the left side with #2 being on the right rear opposite
I switched the coil pacs on what I believe are the # 1 and #2 cylinders to see if the code would move also. The code stayed off for about 600 miles but returned as the same PO301. Before replacing the one plug I want to be sure I have identified the correct plug. How are the cylinders numbered while facing the engine from left to right.

The term "inline" refers to the configuration of the cylinders in the engine block. In an inline engine, the cylinders are positioned in a straight line and can be configured as an inline 2, 3, 4

The remaining cylinders follow this order with all of the odd numbered cylinders (1, 3, 5, 7) on the left side/driver’s side of the engine and the even numbered cylinders (2, 4, 6, 8) on the right/passenger side. Based on our research, this firing order applies to 267, 283, 302, 305, 307, 327, 350, 400, 366, 396, 402, 427, 454, and 502 cubic
There are 8 cylinders in the Ford 5.4-liter V8 engine. Their numbering starts from 1 to 8 in a specific order according to their location. Cylinder # 1 is on the passenger side bank in front of the engine closest to the radiator. The next one in the sequence is cylinder #2, then #3, and the last one the farthest is #4 on the same bank.
Engine Cylinder Numbering Explained. Mac's Garage. 3.92K subscribers. Subscribe. Subscribed. 1.2K. 169K views 3 years ago. This covers inline and v8 style engines (Ford and everyone else)
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how are engine cylinders numbered