Details

• Brand:

  

  

• SKU:

  WR-6120

• Other Names:

  Motorcraft™ Cable Set, Motorcraft™ Ignition Set, Motorcraft™ Plug Wire Set, Kit

• Description:

  This Genuine Ford Motorcraft spark plug wire set feeds high-voltage current from the distributorless ignition coils to each spark plug on the 4.0L SOHC V6 used in the 2001-2011 Ford Ranger and the 2001-2005 Explorer Sport Trac. Each lead maintains a low-resistance, well-insulated spark path and suppresses electrical interference so coil energy reaches every cylinder cleanly, with silicone insulation that withstands under-hood heat, oil, and vibration. As the wires age the boots crack, the conductor corrodes, and resistance rises, letting spark energy bleed to ground before it fires the plug. The result is a rough idle, cylinder misfire, hesitation on acceleration, a flashing or steady check engine light with misfire codes, hard starting, and lost fuel economy. Replacing the complete wire set restores a strong, consistent spark to all six cylinders and clears the intermittent misfires that one failing lead can trigger. Ford catalogs this Motorcraft assembly as part number WR-6120 for the 4.0L SOHC application. Install one lead at a time so the firing order stays correct, seat each boot fully onto the spark plug and coil tower until it clicks, apply a light film of dielectric grease, and route every wire away from hot exhaust surfaces to prevent heat damage. Fitting a fresh, properly routed wire set is the most reliable way to restore smooth idle, crisp throttle response, and proper combustion to a high-mileage 4.0L Ranger or Explorer Sport Trac.

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