The distributor cap's plug wire placement corresponds directly to the firing order. Number the terminals on the distributor cap (usually 1-6, though sometimes they're marked with numbers or letters corresponding to the cylinders, check your cap) and then connect the wires according to the firing order:
* Terminal 1: Cylinder 1 plug wire
* Terminal 2: Cylinder 5 plug wire
* Terminal 3: Cylinder 3 plug wire
* Terminal 4: Cylinder 6 plug wire
* Terminal 5: Cylinder 2 plug wire
* Terminal 6: Cylinder 4 plug wire
Important Note: It's crucial to correctly identify Cylinder #1 before connecting the wires. There are various ways to do this, but the easiest is often to look at the engine and locate the number 1 cylinder (often marked on the engine block itself or easily identifiable by its position in relation to the timing chain cover).
If you're unsure about any part of this process, it's always best to consult a repair manual specific to your 2001 Ford Ranger 3.0L engine. Incorrectly connecting the plug wires can lead to engine misfires and potential damage.
