How to Replace Spark Plugs and Wires 98-12 Ford Ranger 4.0L V6

Difficulty: Intermediate · About 30 min · Ford Ranger

Replace the spark plugs and wires on a 1998-2012 Ford Ranger with the 4.0L V6 engine.

Steps

1. Remove the old spark plug and wire

   Pull the spark plug wire off the plug, remove the plug with a spark plug socket and ratchet, pull the wire off the distributor, pry open its retainer with a flat blade screwdriver, then pull the wire out.

2. Lay out the new wires

   Lay the new spark plug wires out by length and match each one to the plug it's replacing, then apply dielectric grease to the wire connections.

3. Install the new spark plug

   Apply dielectric grease to the plug, line it up by hand, thread it in with a spark plug socket and extension, then tighten it with the socket and ratchet.

4. Install the new spark plug wire

   Connect it to the distributor, route it through the wire retainer, connect the other end to the spark plug, repeat for the remaining plugs, then snap the retainer closed.

Check your vehicle’s repair manual for exact specifications and fit.