In 2007, Toyota introduced the FJ Cruiser, a tribute to its classic FJ40-series Land Cruiser. The FJ Cruiser, an off-road vehicle, features a 4.0-liter V6 engine paired to one of two available four-wheel drive systems. The manufacturer's manual for the FJ Cruiser recommends changing the spark plugs every 30,000 miles.
Pop the hood using the release lever located inside the vehicle, near the driver's side footwell.
Make sure the engine is cold. Disconnect the battery and check the temperature of the engine.
Remove the plastic, engine-bay cover; the air-intake pipe on the passenger side; and two black brackets on the driver's side, located directly behind the engine oil filler cap. Of the two brackets, one will be nearest the firewall. Locate the end of the vent-tube that's behind and slightly to the left of that bracket, and disconnect it.
Unplug the black electrical plugs from every coil pack.
Unbolt the coil packs and remove them by pulling them up.
Uninstall the spark plugs using the spark plug socket, extension and wrench.
Hand-tighten the new spark plugs into position and then tighten the spark plugs to 14 foot-lbs. with the torque wrench.
Reinstall all coil packs onto the new spark plugs and reattach them to their corresponding electrical plugs.
Reinstall the two driver side brackets, vent-tube and the passenger side air-intake pipe. Reattach the plastic engine bay cover and reconnect the battery.
