Spark plug wiring diagram 1999 ford f150 v6 4.2 liter engine?

For a 1999 Ford F-150 with a 4.2-liter V6 engine, the spark plug wiring follows a specific firing order of 1-4-2-5-3-6. The cylinder numbering starts from the front of the engine, with cylinder 1 on the driver's side. The spark plug wires should be connected to the ignition coil in the correct order: cylinder 1 to coil terminal 1, cylinder 4 to terminal 2, cylinder 2 to terminal 3, and so on. Always ensure to consult a service manual or wiring diagram for precise routing and connections.